I'm being offered the opportunity to buy a Core i7 920 on an http://www.asus.com/Motherboards/Int...e_III_Extreme/ with 12 gigs of RAM. There may be a 4870x2 available (though I am not interested in the GPU) as well as a power supply (which I can evaluate on my own).

eBay research is putting this out of my price range. What's the mobo+CPU+RAM worth? What's the GPU worth if added in there?