La Purisima Golf Club-Lompoc, CA 60 m-th, 78 f-su to walk, 18 for a cart anytime
I would put Rustic Canyon down too, along with Rancho Park in LA.
It comes down to supply and demand, unless a municipality keeps the rates down near a big city or the course is out of the way they would have to be fools to not raise rates to meet demand. Torrey Pines and Harding Park visitor rates over $100 allow them to charge locals the low rates.
I think Bandon is a new phenominon, the great course in the middle of nowhere that can charge $200+ based on publicity from golf magazines and internet exposure through top 100 lists. In today's information age, there will be less and less hidden gems that are affordable.