I'm thinking about jumping on a 8800GTS and have to decide which card to sell to offset the cost a bit. I have a evga 7900GT but I would rather pass it on to my son. I also have a BFG 6800 OC AGP card that is currently in my son's rig. I would rather sell it but have no idea what a fair asking price would be for it. Is $100.00 too much? Suggestions?