My vote is $200 only as an extreme upper limit. When it comes to collecting a complete set for a system, I tend to leave the expensive games as last for two reasons:
A) Don't have the funds to spend on ONE game.
B) The more I hold off on it, the better the chance a great deal will pop up.
I'm still hoping one day, I'll find it for $5 lying in the back of a discount store. But a man can dream, can't he?