I found it at a store for about ten dollars. Keep in mind it was used but it seems pretty good quality to me and I have yet to find a problem with it. There's only been once or twice I have had to bring back something that was used. But then, I've also had to bring back things that were practically brand new so..
I have both the GBA and Super Nintendo versions and I would say it definitely
is worth it. It's a pretty fun game.