At newegg.com
You can easily get a Radeon 9600 SE 128mb for around 58-68$ by sapphire,gigabyte,original
ATI
You can get a 128mb Fx5200 for 58-62$(money waste as compared to a 9600 SE) by gigabyte,XFX,albatronMSI etc
a FX5600XT around 90-100(at max)$ by gainward
i kwow this one is out of ur...