I just bought the Greatest hits version last week. It is a new disc & appears to be clean & unscratched. I have received "Disc Read Error" when trying to load the game. I try a few times & eventually is starts up.

I have put other PS1 & PS2 games in the machine & they play fine.

My son says my nephew has a PS2 also so I may take the disc & memory card over there tomorrow to see what it does in his machine.