1. A method of offering a targeted online group buying sale by a group buying server, comprising: receiving a request to access an on-line group-buying web site; selecting, by the group buying server, the targeted online group buying sale from a plurality of online group buying sales according to geographic buyer location criteria, the targeted online group buying sale corresponding to a featured product or service associated with the geographic buyer location criteria; providing, by the group buying server, a web page featuring the targeted online group buying sale, the web page indicating a group-purchase price for the featured product or service, the group-purchase price being available according to a step-wise pricing scheme; receiving an irrevocable offer to join a buying group; and accepting the irrevocable offer.