Oh, I realize my mistake. Sorry about that. I think I should've rephrased my question, since I was just wondering where I could sell the cards, but I realize I screwed up my wording. But while we're at it, I'll comply and see what you guys say.
Currently running:
CPU:Intel i5-3570K 3.40 Ghz
16 GB Ram
Mobo: Z77A-GD65 Gaming
Can't remember PSU model, its covered by a shield in the case, but it can handle basically anything that isn't really ridiculous.
Case: Cooler master HAF X (This thing is huge)
Not sure what else is relevant. I want to stay NVidia because shadowplay is a lifesaver for me. I was just hoping to sell my current cards to get a bit of help buying a newer card, before my current cards get too old to even be sold.