My 8800gt fried recently (aluminum heatsink fell off the vreg chips while folding@home)
I upgraded to a gtx 260 refurb for $130
So I have my fanless arctic cooling accelero s2 heatsink, (Great heatsink, not so great sticky tape on the vreg heatsinks)
It's worth about $30 bucks new. I'd be willing to part with it for $20 S&H included. payment via paypal verfied address only.
Alternatively, I am willing buy someones 8800 or 9800 off their hands on the cheap. I have a second PC that is ready to game, just needs GFX card.
I would offer about $45-55 for an 8800 or 55-60 for a 9800, there basically the same chip.