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Users list items they have and they'd like to receive. A trade, or swap, is initiated when at least two users agree to swap items they have. Swap.com charges a service fee for processing and listing items that are sent to its logistics center, as well as a sales commission. Three-way trades are created when at least one user has something to trade, but wants something other than what their trade partner has to give.
The Swap.com Valet Service was introduced in October 2012. The Valet Service lets users trade (buy, sell or swap) kids' items like sports equipment, clothing, toys, and kids' accessories.