Those prices are
$19, $23, and $40 more than you should pay for a
GF2 MX200 32mb, a
GF2 MX400 64mb (link) (what I use), or a TNT2
(link). The MX200 is a really bad deal because it is half the speed for $4 less!!
Also, more importantly, your computer
does not have an AGP slot so none of those cards will work. You can either try to find a
PCI video card (a different kind of connector) or start considering upgrading the PC.
I hate telling people that their computer is old, because I believe people should buy the amount of computer they NEED rather than the amount of computer everyone tells them they need.
But $400~500 would build you a blazing fast PC that I would be proud to call my own.