Old vs New gpu performance

[chexor]

I need a decent gpu to play some MMO games at 720p mostly.

I can get for for similar price: RX 460 (2gb), GTX 670 (2gb), HD 7870 (2gb)

All gpu's are used, but price is same on all of them (around 90$), i think that the GTX 670 is best here (10 more $ then RX 460) but it is very old used GPU, not sure if it is worth it to go for GTX 670?

[Guest]

I would say get the GTX 670, The reason for that is because if you look here on userbenchmark, The Gtx 670 is ~%41 better than the RX 460, And On this one the Gtx 670 is ~%15 better than the 7870.