Forgive me if this is old news, but I stumbled upon a site that I found VERY interesting. It is a site that will show you all the auctions on eBay for whatever particular item you are looking for (in my case, and probably yours...lava lamps) and it will show you the current prices, the time left AND how many people are watching the auction. I like the idea of knowing how many people are watching the lamp I might be interested in because it will help me decide how much I am going to put in for a bid at the very end of the auction. Take a look at the site, search for lava lamps, and point your mouse on a picture so you can see what I am talking about.
toolhaus.org is a groovy place to look up all the negative and neutral feedback