For most items, we recommend a price based on recently sold, similar items – the Terapeak Research Tool uses recent eBay supply, demand and pricing data to help you determine what to sell, when to sell it and at what price. However, how you price your item depends on how you want to sell it, either by auction or fixed price listing on eBay. For auctions, you need to start with the lowest price possible to attract buyers. For fixed-price listings, you can fix prices based on how much profit you want to make.