diff --git a/integration-tests/api/__tests__/admin/draft-order.js b/integration-tests/api/__tests__/admin/draft-order.js
index d70b7de1a2..612a8c269e 100644
--- a/integration-tests/api/__tests__/admin/draft-order.js
+++ b/integration-tests/api/__tests__/admin/draft-order.js
@@ -75,7 +75,7 @@ describe("/admin/draft-orders", () => {
 
       const payload = {
         email: "oli@test.dk",
-        shipping_address_id: "oli-shipping",
+        shipping_address: "oli-shipping",
         items: [
           {
             variant_id: "test-variant",
@@ -109,7 +109,7 @@ describe("/admin/draft-orders", () => {
 
       const payload = {
         email: "oli@test.dk",
-        shipping_address_id: "oli-shipping",
+        shipping_address: "oli-shipping",
         items: [
           {
             variant_id: "test-variant",
@@ -148,7 +148,7 @@ describe("/admin/draft-orders", () => {
 
       const payload = {
         email: "oli@test.dk",
-        shipping_address_id: "oli-shipping",
+        shipping_address: "oli-shipping",
         discounts: [{ code: "TEST" }],
         items: [
           {
@@ -302,6 +302,7 @@ describe("/admin/draft-orders", () => {
       );
       // expect draft order to be complete
       expect(updatedDraftOrder.data.draft_order.status).toEqual("completed");
+      expect(updatedDraftOrder.data.draft_order.completed_at).not.toEqual(null);
     });
   });
   describe("GET /admin/draft-orders", () => {
diff --git a/integration-tests/api/__tests__/admin/order.js b/integration-tests/api/__tests__/admin/order.js
index d4c7b27793..704dc277a5 100644
--- a/integration-tests/api/__tests__/admin/order.js
+++ b/integration-tests/api/__tests__/admin/order.js
@@ -67,7 +67,7 @@ describe("/admin/orders", () => {
       await manager.query(`DELETE FROM "user"`);
     });
 
-    it("creates a cart", async () => {
+    it("gets orders", async () => {
       const api = useApi();
 
       const response = await api
diff --git a/integration-tests/api/__tests__/store/cart.js b/integration-tests/api/__tests__/store/cart.js
index 6973014f02..9b5ceeb22b 100644
--- a/integration-tests/api/__tests__/store/cart.js
+++ b/integration-tests/api/__tests__/store/cart.js
@@ -20,6 +20,7 @@ describe("/store/carts", () => {
     await manager.query(`DELETE FROM "shipping_method"`);
     await manager.query(`DELETE FROM "shipping_option"`);
     await manager.query(`DELETE FROM "cart"`);
+    await manager.query(`DELETE FROM "address"`);
     await manager.query(`DELETE FROM "customer"`);
     await manager.query(
       `UPDATE "country" SET region_id=NULL WHERE iso_2 = 'us'`
@@ -143,6 +144,41 @@ describe("/store/carts", () => {
       expect(response.status).toEqual(200);
     });
 
+    it("updates address using string id", async () => {
+      const api = useApi();
+
+      const response = await api.post("/store/carts/test-cart", {
+        billing_address: "test-general-address",
+        shipping_address: "test-general-address",
+      });
+
+      expect(response.data.cart.shipping_address_id).toEqual(
+        "test-general-address"
+      );
+      expect(response.data.cart.billing_address_id).toEqual(
+        "test-general-address"
+      );
+      expect(response.status).toEqual(200);
+    });
+
+    it("updates address", async () => {
+      const api = useApi();
+
+      const response = await api.post("/store/carts/test-cart", {
+        shipping_address: {
+          first_name: "clark",
+          last_name: "kent",
+          address_1: "5th avenue",
+          city: "nyc",
+          country_code: "us",
+          postal_code: "something",
+        },
+      });
+
+      expect(response.data.cart.shipping_address.first_name).toEqual("clark");
+      expect(response.status).toEqual(200);
+    });
+
     it("adds free shipping to cart then removes it again", async () => {
       const api = useApi();
 
diff --git a/integration-tests/api/__tests__/store/draft-order.js b/integration-tests/api/__tests__/store/draft-order.js
index 1389244436..2246f192b2 100644
--- a/integration-tests/api/__tests__/store/draft-order.js
+++ b/integration-tests/api/__tests__/store/draft-order.js
@@ -45,7 +45,9 @@ describe("/store/carts (draft-orders)", () => {
       await manager.query(`DELETE FROM "product"`);
       await manager.query(`DELETE FROM "shipping_method"`);
       await manager.query(`DELETE FROM "shipping_option"`);
+      await manager.query(`UPDATE "discount" SET rule_id=NULL`);
       await manager.query(`DELETE FROM "discount"`);
+      await manager.query(`DELETE FROM "discount_rule"`);
       await manager.query(`DELETE FROM "payment_provider"`);
       await manager.query(`DELETE FROM "payment_session"`);
       await manager.query(`UPDATE "payment" SET order_id=NULL`);
@@ -64,6 +66,7 @@ describe("/store/carts (draft-orders)", () => {
         `UPDATE "country" SET region_id=NULL WHERE iso_2 = 'de'`
       );
       await manager.query(`DELETE FROM "region"`);
+      await manager.query(`DELETE FROM "user"`);
     });
 
     it("completes a cart for a draft order thereby creating an order for the draft order", async () => {
diff --git a/integration-tests/api/helpers/cart-seeder.js b/integration-tests/api/helpers/cart-seeder.js
index 7280e6d9bf..dfbf4d4ffe 100644
--- a/integration-tests/api/helpers/cart-seeder.js
+++ b/integration-tests/api/helpers/cart-seeder.js
@@ -7,6 +7,7 @@ const {
   ShippingProfile,
   ShippingOption,
   ShippingMethod,
+  Address,
 } = require("@medusajs/medusa");
 
 module.exports = async (connection, data = {}) => {
@@ -16,6 +17,12 @@ module.exports = async (connection, data = {}) => {
     type: "default",
   });
 
+  await manager.insert(Address, {
+    id: "test-general-address",
+    first_name: "superman",
+    country_code: "us",
+  });
+
   const r = manager.create(Region, {
     id: "test-region",
     name: "Test Region",
diff --git a/integration-tests/api/helpers/draft-order-seeder.js b/integration-tests/api/helpers/draft-order-seeder.js
index 89b5aafbb7..b5d694daa0 100644
--- a/integration-tests/api/helpers/draft-order-seeder.js
+++ b/integration-tests/api/helpers/draft-order-seeder.js
@@ -12,6 +12,7 @@ const {
   DraftOrder,
   Discount,
   DiscountRule,
+  Payment,
 } = require("@medusajs/medusa");
 
 module.exports = async (connection, data = {}) => {
@@ -189,6 +190,19 @@ module.exports = async (connection, data = {}) => {
     metadata: { draft_order_id: "test-draft-order" },
   });
 
+  const pay = manager.create(Payment, {
+    id: "test-payment",
+    amount: 10000,
+    currency_code: "usd",
+    amount_refunded: 0,
+    provider_id: "test-pay",
+    data: {},
+  });
+
+  await manager.save(pay);
+
+  c.payment = pay;
+
   await manager.save(c);
 
   await manager.insert(PaymentSession, {
@@ -197,12 +211,12 @@ module.exports = async (connection, data = {}) => {
     provider_id: "test-pay",
     is_selected: true,
     data: {},
-    status: "pending",
+    status: "authorized",
   });
 
   const draftOrder = manager.create(DraftOrder, {
     id: "test-draft-order",
-    status: "awaiting",
+    status: "open",
     display_id: 4,
     cart_id: "test-cart",
     customer_id: "oli-test",
diff --git a/packages/medusa-core-utils/src/validator.js b/packages/medusa-core-utils/src/validator.js
index 4661f75578..43fe68f5cd 100644
--- a/packages/medusa-core-utils/src/validator.js
+++ b/packages/medusa-core-utils/src/validator.js
@@ -2,19 +2,29 @@ import Joi from "joi"
 
 Joi.objectId = require("joi-objectid")(Joi)
 
+// if address is a string, we assume that it is an id
 Joi.address = () => {
-  return Joi.object().keys({
-    first_name: Joi.string().required(),
-    last_name: Joi.string().required(),
-    address_1: Joi.string().required(),
-    address_2: Joi.string().allow(null),
-    city: Joi.string().required(),
-    country_code: Joi.string().required(),
-    province: Joi.string().allow(null),
-    postal_code: Joi.string().required(),
-    phone: Joi.string().optional(),
-    metadata: Joi.object().allow(null),
-  })
+  return Joi.alternatives().try(
+    Joi.string(),
+    Joi.object().keys({
+      first_name: Joi.string().required(),
+      last_name: Joi.string().required(),
+      address_1: Joi.string().required(),
+      address_2: Joi.string()
+        .allow(null, "")
+        .optional(),
+      city: Joi.string().required(),
+      country_code: Joi.string().required(),
+      province: Joi.string()
+        .allow(null, "")
+        .optional(),
+      postal_code: Joi.string().required(),
+      phone: Joi.string().optional(),
+      metadata: Joi.object()
+        .allow(null, {})
+        .optional(),
+    })
+  )
 }
 
 Joi.dateFilter = () => {
diff --git a/packages/medusa/src/api/routes/admin/draft-orders/create-draft-order.js b/packages/medusa/src/api/routes/admin/draft-orders/create-draft-order.js
index 6263ebafe2..3c0e358a9e 100644
--- a/packages/medusa/src/api/routes/admin/draft-orders/create-draft-order.js
+++ b/packages/medusa/src/api/routes/admin/draft-orders/create-draft-order.js
@@ -25,12 +25,6 @@ import { defaultFields, defaultRelations } from "."
  *             description: "The Address to be used for shipping."
  *             anyOf:
  *               - $ref: "#/components/schemas/address"
- *           billing_address_id:
- *             description: The id of an existing billing Address
- *             type: string
- *           shipping_address_id:
- *             description: The id of an existing shipping Address
- *             type: string
  *           items:
  *             description: The Line Items that have been received.
  *             type: array
@@ -98,15 +92,13 @@ import { defaultFields, defaultRelations } from "."
 export default async (req, res) => {
   const schema = Validator.object().keys({
     status: Validator.string()
-      .valid("open", "awaiting", "completed")
+      .valid("open", "completed")
       .optional(),
     email: Validator.string()
       .email()
       .required(),
     billing_address: Validator.address().optional(),
     shipping_address: Validator.address().optional(),
-    billing_address_id: Validator.string().optional(),
-    shipping_address_id: Validator.string().optional(),
     items: Validator.array()
       .items({
         variant_id: Validator.string()
diff --git a/packages/medusa/src/api/routes/admin/draft-orders/create-line-item.js b/packages/medusa/src/api/routes/admin/draft-orders/create-line-item.js
index efcac4cfa7..39b558d53f 100644
--- a/packages/medusa/src/api/routes/admin/draft-orders/create-line-item.js
+++ b/packages/medusa/src/api/routes/admin/draft-orders/create-line-item.js
@@ -66,10 +66,7 @@ export default async (req, res) => {
         .withTransaction(manager)
         .retrieve(id, { select: defaultFields, relations: ["cart"] })
 
-      if (
-        draftOrder.status === "completed" ||
-        draftOrder.status === "awaiting"
-      ) {
+      if (draftOrder.status === "completed") {
         throw new MedusaError(
           MedusaError.Types.NOT_ALLOWED,
           "You are only allowed to update open draft orders"
diff --git a/packages/medusa/src/api/routes/admin/draft-orders/delete-line-item.js b/packages/medusa/src/api/routes/admin/draft-orders/delete-line-item.js
index e1eeaf95bf..05680fa190 100644
--- a/packages/medusa/src/api/routes/admin/draft-orders/delete-line-item.js
+++ b/packages/medusa/src/api/routes/admin/draft-orders/delete-line-item.js
@@ -35,10 +35,7 @@ export default async (req, res) => {
         .withTransaction(manager)
         .retrieve(id, { select: defaultFields })
 
-      if (
-        draftOrder.status === "completed" ||
-        draftOrder.status === "awaiting"
-      ) {
+      if (draftOrder.status === "completed") {
         throw new MedusaError(
           MedusaError.Types.NOT_ALLOWED,
           "You are only allowed to update open draft orders"
diff --git a/packages/medusa/src/api/routes/admin/draft-orders/update-draft-order.js b/packages/medusa/src/api/routes/admin/draft-orders/update-draft-order.js
index 7c53814d25..6230f553d5 100644
--- a/packages/medusa/src/api/routes/admin/draft-orders/update-draft-order.js
+++ b/packages/medusa/src/api/routes/admin/draft-orders/update-draft-order.js
@@ -67,11 +67,6 @@ export default async (req, res) => {
         code: Validator.string(),
       })
       .optional(),
-    gift_cards: Validator.array()
-      .items({
-        code: Validator.string(),
-      })
-      .optional(),
     customer_id: Validator.string().optional(),
   })
 
@@ -86,7 +81,7 @@ export default async (req, res) => {
 
     const draftOrder = await draftOrderService.retrieve(id)
 
-    if (draftOrder.status === "completed" || draftOrder.status === "awaiting") {
+    if (draftOrder.status === "completed") {
       throw new MedusaError(
         MedusaError.Types.NOT_ALLOWED,
         "You are only allowed to update open draft orders"
diff --git a/packages/medusa/src/api/routes/admin/draft-orders/update-line-item.js b/packages/medusa/src/api/routes/admin/draft-orders/update-line-item.js
index 56a2350d3e..c1171f228e 100644
--- a/packages/medusa/src/api/routes/admin/draft-orders/update-line-item.js
+++ b/packages/medusa/src/api/routes/admin/draft-orders/update-line-item.js
@@ -64,10 +64,7 @@ export default async (req, res) => {
           relations: ["cart", "cart.items"],
         })
 
-      if (
-        draftOrder.status === "completed" ||
-        draftOrder.status === "awaiting"
-      ) {
+      if (draftOrder.status === "completed") {
         throw new MedusaError(
           MedusaError.Types.NOT_ALLOWED,
           "You are only allowed to update open draft orders"
diff --git a/packages/medusa/src/api/routes/store/carts/update-cart.js b/packages/medusa/src/api/routes/store/carts/update-cart.js
index dbd871c676..83f1e79301 100644
--- a/packages/medusa/src/api/routes/store/carts/update-cart.js
+++ b/packages/medusa/src/api/routes/store/carts/update-cart.js
@@ -75,8 +75,8 @@ export default async (req, res) => {
     email: Validator.string()
       .email()
       .optional(),
-    billing_address: Validator.object().optional(),
-    shipping_address: Validator.object().optional(),
+    billing_address: Validator.address().optional(),
+    shipping_address: Validator.address().optional(),
     gift_cards: Validator.array()
       .items({
         code: Validator.string(),
diff --git a/packages/medusa/src/migrations/1623063141210-draft_order_completed_at.ts b/packages/medusa/src/migrations/1623063141210-draft_order_completed_at.ts
new file mode 100644
index 0000000000..787e160241
--- /dev/null
+++ b/packages/medusa/src/migrations/1623063141210-draft_order_completed_at.ts
@@ -0,0 +1,28 @@
+import {MigrationInterface, QueryRunner} from "typeorm";
+
+export class draftOrderCompletedAt1623063141210 implements MigrationInterface {
+    name = 'draftOrderCompletedAt1623063141210'
+
+    public async up(queryRunner: QueryRunner): Promise<void> {
+        await queryRunner.query(`ALTER TABLE "draft_order" ADD "completed_at" TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT now()`);
+        await queryRunner.query(`ALTER TYPE "public"."draft_order_status_enum" RENAME TO "draft_order_status_enum_old"`);
+        await queryRunner.query(`CREATE TYPE "draft_order_status_enum" AS ENUM('open', 'completed')`);
+        await queryRunner.query(`ALTER TABLE "draft_order" ALTER COLUMN "status" DROP DEFAULT`);
+        await queryRunner.query(`ALTER TABLE "draft_order" ALTER COLUMN "status" TYPE "draft_order_status_enum" USING "status"::"text"::"draft_order_status_enum"`);
+        await queryRunner.query(`ALTER TABLE "draft_order" ALTER COLUMN "status" SET DEFAULT 'open'`);
+        await queryRunner.query(`DROP TYPE "draft_order_status_enum_old"`);
+        await queryRunner.query(`COMMENT ON COLUMN "draft_order"."status" IS NULL`);
+    }
+
+    public async down(queryRunner: QueryRunner): Promise<void> {
+        await queryRunner.query(`COMMENT ON COLUMN "draft_order"."status" IS NULL`);
+        await queryRunner.query(`CREATE TYPE "draft_order_status_enum_old" AS ENUM('open', 'awaiting', 'completed')`);
+        await queryRunner.query(`ALTER TABLE "draft_order" ALTER COLUMN "status" DROP DEFAULT`);
+        await queryRunner.query(`ALTER TABLE "draft_order" ALTER COLUMN "status" TYPE "draft_order_status_enum_old" USING "status"::"text"::"draft_order_status_enum_old"`);
+        await queryRunner.query(`ALTER TABLE "draft_order" ALTER COLUMN "status" SET DEFAULT 'open'`);
+        await queryRunner.query(`DROP TYPE "draft_order_status_enum"`);
+        await queryRunner.query(`ALTER TYPE "draft_order_status_enum_old" RENAME TO  "draft_order_status_enum"`);
+        await queryRunner.query(`ALTER TABLE "draft_order" DROP COLUMN "completed_at"`);
+    }
+
+}
diff --git a/packages/medusa/src/models/draft-order.ts b/packages/medusa/src/models/draft-order.ts
index 2406133ff4..85e761ebb4 100644
--- a/packages/medusa/src/models/draft-order.ts
+++ b/packages/medusa/src/models/draft-order.ts
@@ -17,7 +17,6 @@ import { Order } from "./order"
 
 enum DraftOrderStatus {
   OPEN = "open",
-  AWAITING = "awaiting",
   COMPLETED = "completed",
 }
 
@@ -59,6 +58,9 @@ export class DraftOrder {
   @UpdateDateColumn({ type: "timestamptz" })
   updated_at: Date
 
+  @UpdateDateColumn({ type: "timestamptz" })
+  completed_at: Date
+
   @Column({ type: "jsonb", nullable: true })
   metadata: any
 
@@ -85,7 +87,6 @@ export class DraftOrder {
  *     type: string
  *     enum:
  *       - open
- *       - awaiting
  *       - completed
  *   display_id:
  *     type: string
@@ -111,6 +112,9 @@ export class DraftOrder {
  *   deleted_at:
  *     type: string
  *     format: date-time
+ *   completed_at:
+ *     type: string
+ *     format: date-time
  *   metadata:
  *     type: object
  *   idempotency_key:
diff --git a/packages/medusa/src/services/cart.js b/packages/medusa/src/services/cart.js
index c49a7b6e55..958b73000d 100644
--- a/packages/medusa/src/services/cart.js
+++ b/packages/medusa/src/services/cart.js
@@ -306,7 +306,12 @@ class CartService extends BaseService {
 
       const regCountries = region.countries.map(({ iso_2 }) => iso_2)
 
-      if (!data.shipping_address && !data.shipping_address_id) {
+      if (data.shipping_address && typeof data.shipping_address === `string`) {
+        const addr = await addressRepo.findOne(data.shipping_address)
+        data.shipping_address = addr
+      }
+
+      if (!data.shipping_address) {
         if (region.countries.length === 1) {
           // Preselect the country if the region only has 1
           // and create address entity
@@ -315,22 +320,11 @@ class CartService extends BaseService {
           })
         }
       } else {
-        if (data.shipping_address) {
-          if (!regCountries.includes(data.shipping_address.country_code)) {
-            throw new MedusaError(
-              MedusaError.Types.NOT_ALLOWED,
-              "Shipping country not in region"
-            )
-          }
-        }
-        if (data.shipping_address_id) {
-          const addr = await addressRepo.findOne(data.shipping_address_id)
-          if (!regCountries.includes(addr.country_code)) {
-            throw new MedusaError(
-              MedusaError.Types.NOT_ALLOWED,
-              "Shipping country not in region"
-            )
-          }
+        if (!regCountries.includes(data.shipping_address.country_code)) {
+          throw new MedusaError(
+            MedusaError.Types.NOT_ALLOWED,
+            "Shipping country not in region"
+          )
         }
       }
 
@@ -782,20 +776,32 @@ class CartService extends BaseService {
    * @param {object} address - the value to set the billing address to
    * @return {Promise} the result of the update operation
    */
-  async updateBillingAddress_(cart, address, addrRepo) {
-    address.country_code = address.country_code.toLowerCase()
-    if (cart.billing_address_id) {
-      const addr = await addrRepo.findOne({
-        where: { id: cart.billing_address_id },
+  async updateBillingAddress_(cart, addressOrId, addrRepo) {
+    if (typeof addressOrId === `string`) {
+      addressOrId = await addrRepo.findOne({
+        where: { id: addressOrId },
       })
+    }
 
-      await addrRepo.save({ ...addr, ...address })
+    addressOrId.country_code = addressOrId.country_code.toLowerCase()
+
+    if (addressOrId.id) {
+      cart.billing_address_id = addressOrId.id
+      cart.billing_address = addressOrId
     } else {
-      const created = addrRepo.create({
-        ...address,
-      })
+      if (cart.billing_address_id) {
+        const addr = await addrRepo.findOne({
+          where: { id: cart.billing_address_id },
+        })
 
-      cart.billing_address = created
+        await addrRepo.save({ ...addr, ...addressOrId })
+      } else {
+        const created = addrRepo.create({
+          ...addressOrId,
+        })
+
+        cart.billing_address = created
+      }
     }
   }
 
@@ -805,11 +811,19 @@ class CartService extends BaseService {
    * @param {object} address - the value to set the shipping address to
    * @return {Promise} the result of the update operation
    */
-  async updateShippingAddress_(cart, address, addrRepo) {
-    address.country_code = address.country_code.toLowerCase()
+  async updateShippingAddress_(cart, addressOrId, addrRepo) {
+    if (typeof addressOrId === `string`) {
+      addressOrId = await addrRepo.findOne({
+        where: { id: addressOrId },
+      })
+    }
+
+    addressOrId.country_code = addressOrId.country_code.toLowerCase()
 
     if (
-      !cart.region.countries.find(({ iso_2 }) => address.country_code === iso_2)
+      !cart.region.countries.find(
+        ({ iso_2 }) => addressOrId.country_code === iso_2
+      )
     ) {
       throw new MedusaError(
         MedusaError.Types.INVALID_DATA,
@@ -817,18 +831,23 @@ class CartService extends BaseService {
       )
     }
 
-    if (cart.shipping_address_id) {
-      const addr = await addrRepo.findOne({
-        where: { id: cart.shipping_address_id },
-      })
-
-      await addrRepo.save({ ...addr, ...address })
+    if (addressOrId.id) {
+      cart.shipping_address = addressOrId
+      cart.shipping_address_id = addressOrId.id
     } else {
-      const created = addrRepo.create({
-        ...address,
-      })
+      if (cart.shipping_address_id) {
+        const addr = await addrRepo.findOne({
+          where: { id: cart.shipping_address_id },
+        })
 
-      cart.shipping_address = created
+        await addrRepo.save({ ...addr, ...addressOrId })
+      } else {
+        const created = addrRepo.create({
+          ...addressOrId,
+        })
+
+        cart.shipping_address = created
+      }
     }
   }
 
diff --git a/packages/medusa/src/services/draft-order.js b/packages/medusa/src/services/draft-order.js
index 8abc900f4d..5da84e98cb 100644
--- a/packages/medusa/src/services/draft-order.js
+++ b/packages/medusa/src/services/draft-order.js
@@ -226,7 +226,6 @@ class DraftOrderService extends BaseService {
   /**
    * Creates a draft order.
    * @param {object} data - data to create draft order from
-   * @param {boolean} shippingRequired - needs shipping flag
    * @return {Promise<DraftOrder>} the created draft order
    */
   async create(data) {
@@ -348,6 +347,7 @@ class DraftOrderService extends BaseService {
       const draftOrder = await this.retrieve(doId)
 
       draftOrder.status = "completed"
+      draftOrder.completed_at = new Date()
       draftOrder.order_id = orderId
 
       await draftOrderRepo.save(draftOrder)
diff --git a/packages/medusa/src/services/line-item.js b/packages/medusa/src/services/line-item.js
index ed9c14a32b..843faae709 100644
--- a/packages/medusa/src/services/line-item.js
+++ b/packages/medusa/src/services/line-item.js
@@ -97,8 +97,12 @@ class LineItemService extends BaseService {
     const region = await this.regionService_.retrieve(regionId)
 
     let price
+    let shouldMerge = true
 
     if (config.unit_price && typeof config.unit_price !== `undefined`) {
+      // if custom unit_price, we ensure positive values
+      // and we choose to not merge the items
+      shouldMerge = false
       if (config.unit_price < 0) {
         price = 0
       } else {
@@ -121,7 +125,7 @@ class LineItemService extends BaseService {
       allow_discounts: !variant.product.is_giftcard,
       is_giftcard: variant.product.is_giftcard,
       metadata: config?.metadata || {},
-      should_merge: true,
+      should_merge: shouldMerge,
     }
 
     return toCreate