According the the Guiness Book of Video Game Records, this game is in the top five best selling games for the Playstation 1.  That means that it is also the most common.  So why why  would this $10-15 game used jump to sky high prices?  I am guessing that the younger generation wants to see what all the hype was about and that the dvd based on this game did not hurt demand either...  Either way, the game is still awesome.