This document discusses dynamic trading mechanisms like electronic auctions, bartering, and negotiations. It begins by defining electronic auctions and different auction types. Forward and reverse auctions are described as well as unique models like name-your-own-price. Benefits include lower prices for buyers and increased revenues for sellers, though fraud and security are limitations. Implementation requires considering auction format, pricing strategy, and whether to use a third-party site. Emerging areas include mobile auctions and global online real-time sales. Managerial issues involve platform choice, auction design, and integrating auctions with other models.