Techniques are described for facilitating transactions involving items and users in various ways. In some situations, item transactions are coordinated by an automated Item Transaction (or “IT”) system provided via one or more computing systems, such that users of the IT system who have available...http://www.google.es/patents/US7895081?utm_source=gb-gplus-sharePatente US7895081 - Facilitating transactions involving buying items from and selling items to users
Facilitating transactions involving buying items from and selling items to users
