Hey bro, we maybe going for the same type of graphics cards in the 2nd hand market if you are deciding going for it...
I have a $200 budget and there are options for GTX 560Ti with warranty, GTX 650Ti with warranty, GTX 580 1.5GB without warranty and the AMD5970 with $50 bucks more...These are still good cards that can play a lot of games in med-high settings in 1280X1024 at least...
To be honest, with these options, I still do not know what I should be getting. I don't OC, do not really game but like to
run nice benchmarks, video streaming to TV and monitor at the same time and I only use it for my 5-6 OS virtualization running under VMware simultaneously.