Tigerdirect has the EVGA 9800GT Akimbo on sale for $50: http://www.tigerdirect.com/applications/SearchTools/ite.... It's the best card you're gonna find in that price range without rebates. It's perfect to make an old machine into a light gaming machine, for a second rig, or for a little brother or something that general nature.
To clarify, I realize now that it's an underclocked 9800GT with only a 90-day warranty. Personally, I'd just go for a $40 AR GT 240 instead. At least that will have a good warranty and isn't underclocked as if it's defective.