I'm a bit surprised... Not so long ago, I saw an auction at eBay where they were selling Suiko3 for 80$. Mind you, I think that's a lot for a game that's previously been played.
I never really believed that Suikoden 3 was rare, but now I do.
Since it's out of print now, owning your own copy is quite a decent thing. Personally, I don't see this game at any local store.
*sniff* I own a rare game
.