whats it worth

[kdfresh09]

I have an EVGA GTX 670 4 gig card...this one to be exact:

http://www.evga.com/Products/Product.aspx?pn=04G-P4-3671-KR

im thinking of selling it. how much should I take for it, bottom line. as in, whats the cheapest I should sell it for

 

[SpringWater]

$280 since that is how much a used one costs on e-bay.