EXhibit 6.7 Buyer Aggregation Model B overs Intermediary Suppliers #1 (aggregator) #1 Buyers RFQ requests ggregating RFQs from A suppliers, collecting RFPs #3 I Suppliers, from bidders, matching (selecting offers) Bids offers etc etc Requests Responses Electronic Commerc Prentice Hall 2006 5Electronic Commerce Prentice Hall © 2006 15 Exhibit 6.7 Buyer Aggregation Model