You can get a 7900GS for as low as, $149/$129 MIR.
edit: Sora beats me to it, as usual...I'll just provide a link:
Newegg.com - EVGA 256-P2-N624-AR GeForce 7900GS 256MB 256-bit GDDR3 PCI Express x16 KO Video Card - Retail
edit: Sora beats me to it, as usual...I'll just provide a link:
Newegg.com - EVGA 256-P2-N624-AR GeForce 7900GS 256MB 256-bit GDDR3 PCI Express x16 KO Video Card - Retail