I just started collecting (in earnest, at least) about 3 weeks ago, and I've got about 1/3 of a bookshelf filled, which I guess is pretty good for the short amount of time I've been looking. I mostly try to get rare RPG's like Ar Tonelico and Magna Carta (even though MC plays like "Legend of Dragoon for Stupids" it's still rare dammit)