Speaking as an Atlus fan since SMT Nocturne on PS2, Atlus has historically been notorious for undershipping/limited production, which subsequentially drives up prices. For example: Super Robot Taisen OG Saga: Endless Frontier, Magna Carta: Tears of Blood, Baroque, Devil Summoner 2: Raidou Kuzunoha versus King Abaddon, Rule of Rose. That being said, some other Atlus titles are cheap, such as Trauma Center: Under The Knife, Digital Devil Saga, Digital Devil Saga 2, so YMMV.