Yes you may consider the Arc the lad collection rare, scary...
Here goes. don't know exactly if all are rare though.
Shadow hearts (series)
Final Fantasy 7 (original and platinum)
Final Fantasy 8 (original and platinum)
Final Fantasy 9 (original and platinum)
Final Fantasy Anthology, with music disc
Final Fantasy 6
Parasite Eve, with Squaresoft collectors disc
Vagrant story, with collectors disc
Legend of Legaia
Brave Fencer Mushasi
Chrono Cross (original)
Xenogears
Vandal Hearts 1 and 2
Saiyuki journey west
Lunar silver star story
Saga frontier 2
Grandia
Alundra
Breath of fire 3 and 4
Metal gear solid
Granstream saga
Suikoden 3
And i think those are the rarest...