I guess you could always buy em as you play em. Maybe by the time you hit the 3rd or 4th game, the price will have been marked down.
I'm talking more about the business side. I can actually afford them all since I have them on pre-order (except for The Dragon Knight Saga, which has yet to receive a listing on most shops), but most people can't. Clogging up the system with games in the same genre isn't such a good idea. Everyone will fall victim to New Vegas.
My Favorite RPGs: Divinity franchise, Gothic franchise (including Arcania, so I think I'm alone...), Venetica, Risen, Two Worlds II, The Witcher, Sacred franchise, Fallout franchise, Mass Effect 1, Alpha Protocol, Planescape: Torment, Drakensang, KOTOR 1 & 2, etc.