Amazon's prices tend to run on the high side, I'll admit, and some games get to be overpriced just because they're rare (DDR Disney Mix for PSX is $130?), but at any rate, there are more than 100 games between the PS1 and PS2 that fetch more than the standard $50 list price now that they're out of print.
The Xbox doesn't have the same kind of phenomenon. There is Steel Battalion which goes for $210, but that's because it comes with its own special 40-button controller which is required to play every other Steel Battalion game, yet isn't available on its own. Beyond that, other than a couple of DDR games, the only expensive OOP games are Marvel vs. Capcom 2 and Moto GP 2, and even those can be had for $47.99 used.
I don't have very many ideas to explain this, except that maybe not many games are going out of print.
The Xbox doesn't have the same kind of phenomenon. There is Steel Battalion which goes for $210, but that's because it comes with its own special 40-button controller which is required to play every other Steel Battalion game, yet isn't available on its own. Beyond that, other than a couple of DDR games, the only expensive OOP games are Marvel vs. Capcom 2 and Moto GP 2, and even those can be had for $47.99 used.
I don't have very many ideas to explain this, except that maybe not many games are going out of print.