Each day, Woot.com features a single product at a low price. Part blog, part community, and part online store. They blog about the product, and allow users to chat and comment about it. There's even a strange little podcast, which today featured a song about how your girlfriend would like a center channel speaker.
This is not where you go with something in mind, but out of curiosity of what will be the deal of the day. It has developed somewhat of a cult following, as shown in this wikipedia entry.
Some would say that the Jellyfish Smack Shopping Deal of the Day has surpassed Woot for a number of reasons.
Er, http://www.jellyfish.com/sotd