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Additionally, checking completed auctions on platforms like eBay and Heritage Auctions proves to be highly beneficial in gauging accurate values for comic books. While numerous price guides may emerge and fade over time, enduring publications like Overstreet (with a history spanning over 35 years) or more recent ones like the Standard Catalog ...
The price had risen to $3,000 before eBay closed the auction. [8] [9] In May 2006, the remains of U.S. Fort Montgomery, a stone fortification in upstate New York built in 1844, were put up for auction on eBay. The first auction ended on June 5, 2006, with a winning bid of US$5,000,310.
Savvy bidders will avoid the winner's curse by bid shading, or placing a bid that is below their ex ante estimation of the value of the item for sale—but equal to their ex post belief about the value of the item, given that they win the auction. The key point is that winning the auction is bad news about the value of the item for the winner ...
Curious about the most expensive items sold on eBay? From a gigayacht to a U.S. town, here are 10 of the most extravagant listings we could find.
Proxy bidding is an implementation of an English second-price auction used on eBay, in which the winning bidder pays the price of the second-highest bid plus a defined increment. It differs from a Vickrey auction in that bids are not sealed; the "current highest bid" (defined as second-highest bid plus bid increment) is always displayed.
Auctiva is an eBay auction management system. It was founded in 1998. One of the original members of the eBay Developer Council, Auctiva has provided sellers and merchants with tools designed to help increase their sales volume on eBay. Jeff Schlicht, who founded Auctiva, wrote a program to automate the task of placing listings on eBay.
However, online auction sites, unlike live auctions, usually have an automatic bidding system which allows a bidder to enter their maximum acceptable bid. This is a hidden or proxy bid, known to the system, but not any other bidders; during the auction the actual bid is incremented only enough to beat the existing highest bid. For example, if ...
Best/not best auctions are sealed-bid auctions with multiple bids, where the bidders submit their prices like in English auction and get responses about the leadership of their bid. [74] Rank auction is an extension of best/not best auction, where the bidders also see the rank of their bids. [75]