I have Suikoden II for the PSX. Pretty pricey I believe.
I have the first one from PSN, and, while it's not a great nor revolutionary RPG, I like it very much so.
Charming characters and story that doesn't get in the way of the gameplay.
I just wish they'd throw the second one on PSN.
I'm not about to pay some asshat on eBay $150 for a used game in unknown condition that I know nothing about.
Oh, and while the game as a whole isn't very rare, I do own the v1.1 of Ocarina Of Time that contains blood and all.
From my understanding, both 1.0 and 1.1 are considered rare as the grand majority of the copies are 1.2+.
EDIT: Apparently I'm wrong now that I looked into it. I was relying on my memory.
Well, either way, I have Planescape: Torment on disk. I mean, it's not like it's now widely available on digital distribution channels for chea-Oh, wait
Hrm. Well, what about Baldur's Ga-Oh, nevermind
How about Anachronox? I mean, the game can't really be found anywhere physically anymore...Beyond eBay...Where repackaged EU versions of it sell for dirt-cheap...
I give up...