Mechanisms are provided to facilitate buying and selling products utilizing social pricing. Sellers initiate sale of a product with volume discounts for a limited time. In other words, the more people that buy a product, the lower the price for the group. Buyers have a real incentive to become prosumers that not only purchase a product but also promote purchase by others. A social pricing system brokers interaction between sellers and buyer groups, and provisions mechanisms to aid promotion of products by consumers utilizing social networks and other online activities.