On Bantler you can search for deals by newest, cheapest, money money saved, or products still available. You can also hide items you are not interested in buying, like clothing or wine.
When I recently checked the site they had a for $40 (orig $78) from REI. Two other items I checked – a pair of Oakley sunglasses for $43 and three Wii sports accessories for $12 – had already sold out.
Bantler has a free iPhone app available on the homepage, too.