A system to facilitate network-based commerce includes receiving information relating to an item to be transacted via a network-based commerce system from a first party. Criterion information specifying at least one criterion to be satisfied by a second party in order for the second party to be qualified...http://www.google.de/patents/US7966243?utm_source=gb-gplus-sharePatent US7966243 - Method and system to automatically qualifying a party to participate in a network-based commerce transaction
