You missed out on the PowerColor 9800Pro 128megs that popped up for $218 last week.
I think the best place to look is bestdeals.com or something, I forgot the address. But it's a site that lists all the price mistakes, coupons, blow-out sales, etc.
A lot of these places tend to throw something up for really cheap for only a few hours so they can clear out stock to make room for new stock. So you gotta be quick on your feet if you want to get an excellent deal