Meh, it's about value, not what system or how old a game is. Classic NES and SNES games have value. If people will buy them, they are priced right. Personally, 10 bucks or less for any classic game fine by me, $5 is ideal.
As most have said here though, those early 2D games have aged better than early polygon games. A game like MarioWorld or Donkey Kong Country is still quite pretty to look at, at the gameplay-focus of 2D games tends to hold up better than a lot of 3D style play. And the Nintendo systems have some real pieces of gaming history. PS1 not so much. Spyro or Crash and others have no where near the legacy of Mario or Zelda. Though I would pay upwards of $20 for the PS1 Final Fantasies.








