A GeForce 2 MX has a clock speed of 166Mhz and costs about £5. You get 33.2Mhz per £1.
A X1950XT has a clock speed of 625Mhz and costs about £150. You get 4.17 Mhz per £1.
Thereofre the GeForce2 MX has a better price for its perfomance than the X1950XT, using this simple example. My point is that when you said "He's getting the best price/performance period", he's not. He might be getting a very good price/performance, and the GeForce2 would of course be a terrible choice.. but, technically, the GeForce 2 has a better price/performance.