We have been enjoying Microsoft's Live Search cashback. If you register for their free cashback program, when you search for things using live.com search, it gives you a 30% cashback link to eBay. If you follow that link, just about any Buy-It-Now purchase will give you 30% cashback (on top of the already discounted eBay price).
So we made some big purchases that we have been putting off. We bought gift cards and some expensive motorcycle gear (a new Arai XD3 helmet and a pair of Asterisk Cell knee braces).
What a deal!