It's a great game, I agree, but hardly worth that sort of money.
Very few games, in my opinion, are $100 material. Actually, come to think of it, games in general aren't really worth that sort of cash to me. Doesn't mean I haven't spent $100 on a game or two in my time, but having said that, I have no problem waiting a long time (years, in some cases) for a game to come along at a decent price.
CC ran me about $45 when I picked it up two or three years back, and I think that's an excellent price point for it.