From the Products Settings (Admin Interface -> Settings -> Listing Settings -> Auctions & Products -> Products Settings) menu:
If enabled allows the listing of products.
Complete the steps described in Create Listing page.
Next, in the Listing Settings section, complete the distinct product fields:
Buy out Price (Product Price)
Enter product price.
Note: Please user this feature only as a last resort. If a product (often because its high price) doesn't sell for a long period of time, one can set smaller buy out price to increase the selling chances.
Enter quantity available for sale.
Note: See Seller Settings for more options regarding item quantity.
Select the available combinations (if admin defines Product Attributes) from the Create Listing page:
The seller can set different price levels for item variations (e.g: Color & Size).
To complete the Product listing, follow the steps detailed in the Create Listing page.