Thats a pretty good gaming card, they were hard to find for a 100 in a long while.
But this is the lowest price yet for a 5770. http://www.newegg.com/Product/Product.aspx?Item=N82E16814131328&cm_re=5770_radeon-_-14-131-328-_-Product
Even if you don't game, someday you might hook up 3 monitors and this could do it. You can have dx11, small gpu die, so it will run cooler at full tilt.
edit: hybrid crossfire is not really supported anymore by Windows 7 or newer hardware than when it was first made available., it sounded like a good idea , but no one recommends it.