Just looked on ebay here in UK, just out of curiousity, and some copies are going for about £9, which isn't much at all. The PC version is the one that is expensive.

Actually for one of the bigger PS1 games, FFVII is worth peanuts compared to some. I mean, FFVIII and IX go for more than VII usually.

But for the question, is $50 worth it for FFVII? My answer is yes. FFVII is a fantastic game, that I was lucky to have thrown in with my PS1. My original copy still works, but I would shell out whatever I needed to own the game again.