Help choose/suggest Gpu

[Ceee9]

My Current specs:
I5 3570k 4.2 stock cooler
8gig of ram
Seasonic-x 660
nvidia 9600 gso 384

i currently find an offer for 2 gtx 260 for about 65-75 dollar, i think that a good buy,
i really want a hd6850 but i cant find any reasonable offers, and i dont want 7750 or 7770,
does the gtx 260 sli really that powerfull like 650 ti,560ti?

*just dont recommend me a new gpu like 560ti,650ti, it cost me more that 260 sli,
just want to spend below 100 dollar or cheaper
*i have seen 650 gold psu with oc 680 sli running 24/7
*this budget gpu just for a few month, i only playing 1440x900, still waiting 8(amd) 7(nvidia) series gpu and my fund for 2650x????p monitor next year.

 

[Ceee9]

i think the pricing make u a little worry bro or maybe my misunderstanding, new item here coz a little expensive then newegg or any major seller, but used item get a lot of price drop, almost 80% of items.