Suikoden III - very common
DarkCloud 2 - common
Katamari Damacy (I think the 2nd will be common) - common
.hack series (I don't have 4 though...) - very common
Kessen II - common
Silpheed - common
Gungriffon Blaze - common
Unlimited Saga - uncommon, but it sucks hardcore....I can't imagine it going up in value
Space Channel 5 Special Edition - common
Metal Gear Solid 2: Substance - extremely common
Ace Combat 4 - extremely common (GH release)
Xenosaga Ep 1 (Worth much more if they release the whole series) - extremely common (also GH)
La Pucelle Tactics - common....it didn't sell well at all, and can be found most anywhere for less than $20
Castle Shikigami 2 - common
Wild Arms 3 - common
Star Ocean: Till the end of time - very common
Suikoden IV - very common
Taiko Drum Master w/ Drum - very common (though finding the box might get difficult)
Non GH Kingdom Hearts - still very common
Technic Beat - common
R-Type Final - extremely common
Driving Emotion Type-S - extremely common