The 770 was a TNT2 card
The AOpen you linked to is a TNT2 M64 card. The TNT2 is the better buy here, because the M64 performs much worse. It has half the memory thoroughput of the normal TNT2
$37 for that card is actually a pretty good buy for an old card.
Heres a better deal though
http://www.axiontech.com/cgi-local/p...t=VIACPA256MXV
$36 for a Geforce2 MX (I dont think its the MX200 version either)
MX200 = the M64 of Geforce2 MX's