IST 432 - Group 7 Presents Online Auction Legal Issues Project Introduction Background on the Portal Project Assignment. B2B: Business to Business B2B Exchanges and EDI, two of the most innovative forms of online business procurement. B2C: Business to Consumer E-Commerce websites, like Amazon.com and uBid.com, are leading the B2C field. C2C: Consumer to Consumer Online garage sales, like eBay, are proving in the online realm that one man's trash is another man's treasure.