New ways of doing business online are being market tested all the time, however consider these new possibilities with in a framework that minimizes danger on your business. I started with WP E-Commerce and was incredibly pleased with how easy it was to enter my product categories and products (complete with variations that was overly complicated in the other open source packages I would tried.) It took a little work to get the checkout exactly how I wanted it, but it surely wasn’t very troublesome.
B2B definitely deals with companies who are doing business with each other. An example of that is manufacturers who are selling their product to distributors, and the wholesalers are selling it to retailers. Thus, the pricing can be based on the number of orders and is frequently up for grabs.