They're about $90 for a refurb, looks like - keep in mind that's hiked because the only people interested in them now are people looking to buy a second one to crossfire with.
On ebay you can buy a pair of them for $90.
Erm, you're not even going to come close to finding a card that can play bf3 or skyrim in ultra for that cost. (Those are some of the more graphically intensive games you could have named.)
The best card in your price range for you would be the 7750.
What resolution are you playing at? That'll tell us how much the 7750 can do for you and what card you'd need to run BF3 and Skyrim.