On line may be your best bet. The selection of used PS 1 games is fairly limited. The PS 2 is definitely the way to go as the reverse compatability of the system was sheer brilliance. We have 40 odd PS 1 games and they all work flawlessly on the PS 2. We have all 3 of the PS one Bandicoot games and have played them all extensively. Have only seen the first PS 2 version and found the load times to be prohibitive. If you like Crash you should check out the Spryo games also. They were lots of fun.