Woot is a deal a day website. They offer 1 item a day at a fairly cheap price and EVERYTHING is $5 shipping. Once a month they have a Woot-Off where an item will sell out (sometimes in seconds) and another item is listed right away.
Also look for the Bag Of Crap. It is usually $4 and can be anything from a ipod case to a plasma TV. They usually sell 1 Bag Of Crap during every Woot-Off.