... with an optimal combination of penny auction settings that can maximize either seller profit or consumer surplus Table 2-1 : Comparison of Penny Auction and eBay Auction Penny Auction eBay Auction ... final auction price is a double-edged sword On one hand, low auction prices attract bidders to participate in this type of auctions On the other hand, in each penny auction, there can be only one ... number of participants and so on There are ten types of penny auctions, each having special auctions settings Among the ten auction types, normal auction and free auction take up the majority, which...