BayCheck

Enter an eBay user ID, and with a single click, retrieve: (1) seller history, (2) bidder history, (3) feedback received, (4) feedback left for others.

Sort and view this data in ways you can't on eBay. Get it instantly and see it all at once to get a good snapshot of the user's activities and reliability, and to find out how they respond to transactions. Use it to track your favorite buyers' or sellers' auctions.