In the volume pricing methodology, a seller initially establishes a price structure for a product which provides for lower prices as larger quantities of the product are purchased. The price structure is electronically made available to potential buyers of the product. For example, the price structure may be displayed on an Internet site. The sellers further establish an "open session" period during which orders for the product are accepted. During the open session period, multiple buyers are able to place orders for the product up to a maximum available quantity. At the end of the open session, the total quantity of products collectively ordered by all of the buyers is calculated. Based on the total quantity ordered, the final price to all buyers is the lowest price provided from the price structure regardless of whether the lowest price had been reached at the time a particular buyer placed their order during the open session.