I am considering buying a used Geforce 128 mb 6600 GT OC from a friend. It was used for about 14 months in an SLI configuration in another computer. I noticed that a 256 mb 7600 GT(which beats a combo 6600 GT SLI, and presumably a 6600 GT OC as well) goes for $130 new. A 6600 GT OC goes for $200 new. A new 6600 GT 128mb (plain) goes for $106. So with the performance and used factors taken into account, I figured about $70-$100 would be correct. Any ideas?