Now that I've "completed" my list, I may add the 10 or so games that aren't exactly RPG's. I think the only true RPG I'm missing is Master of Monsters, but that's a strategy/RPG from what I heard which is why I initially passed it up.
BBoyKimChee: I'd definitely recommend Suikoden I and II, Valkyrie Profile, Breath of Fire III, Final Fantasy Tactics, Wild Arms, Lunar: SSSC, and Lunar 2: Eternal Blue
EpicWolf: Impressive. My sealed collection was pretty nice for a little while. I had a sealed Final Fantasy VII, Legend of Mana, Vagrant Story and a few others. Mind you, those were all original. As for the guides, I have around 40 of 60 guides in my collection. I've got most of the big hitters like Suikoden, Suikoden II, Lunar 2: EB, Castlevania: SotN, and many, many others.