Collecting goes virtual with Stamp Art Fever, the first stamp collecting game that recreates specific aspects of stamp collecting while embedding elements of a good game. Players try to build their virtual stamp collection by buying, trading, and bidding on any of over 100 different stamps.
iPhone and iPad apps tagged "auctions."
Ebay Mobile is a Good App for Auction Addicts
I am not a massive eBay user; but I can recognize a good app version of a website when I see one, and the eBay app fits the bill.
Free, slim and efficient; the app allows you to quickly monitor and bid in all your auctions.