Snapsearch. Terribly clever idea, chaps. eBay search engine with retail offers alongside for comparison. Unfortunately the retail ads are invariably from really annoying portals like Pricerunner, Shopgenie or Dealtime which makes it worse than useless. With more/better filtering it could be cool.
Snapsearch.com is a combined eBay and Internet search engine which allows you to research prices on eBay and on the net at the same time. To use it, all you need to do is type in what you are looking for and Snapsearch.com will do the rest. Results are displayed on a split screen allowing you to compare prices for your chosen item.