If you offer the same product in multiple conditions (new or used), you must create separate listings for each condition. If you add a listing which has same basic product information like product name, brand name, etc., then it must have at least one different inventory attribute such as condition, condition note or price, and it should have a unique SKU provided by seller.
If you have multiple listings for the same product, and condition, you can increase the quantity for each listing. For example: 3 new and 4 used digital cameras.
Each listing has a unique SKU. However, they are displayed on the same product detail page as they are the same product with different conditions.
To create a separate listing for each condition type, follow these steps:
When you list a product that has at least one other offer, Add a Product lets you match the price of your listing to the current lowest priced other listing with the same condition. For more information, see Match Low Price.