1. A method comprising: receiving, at a first computer system, a request to list an offering to a buyer using an auction purchase process and a fixed-price purchase process; determining, at the first computer system, whether a bid has been received for the offering to the buyer the determining done at least in part through the use of one or more processors; and presenting, via the first computer system, simultaneously to the buyer, both an auction purchase process option and a fixed-price purchase process option responsive to the determining that the bid has not been received, the auction purchase process option for initiating an auction purchase process for purchase of the offering and the fixed-price purchase process option for initiating a fixed-price purchase process for purchase of the offering.