Originally posted by bousozoku
It's not possible to get a new GeForce 2 MX or 4 MX by itself. Someone who's upgraded to a GeForce 3Ti or 4Ti may have one for auction though.
The cheaper retail cards are both from ATI--Radeon 7500 and 9000, if you're looking for AGP. If it's PCI, the Radeon PCI or Radeon 7000.