Stifu said:
You may not be stupid enough for that, but obviously, some other people are.
Or maybe they just have so much money they lost track of the value of money itself... 
Anyway, my way of seeing things: if it's too expensive, don't buy. Buyers are the ones setting prices. If something doesn't sell because of its price, either it will never gets sold, either sellers will have to lower prices.
That would only work in theory since there's always some crazy boys to buy no matter how pricey something is.
I used to think this was true, and in the real word with grocery stores, and car dealerships, etc it pretty much is true, but in the word of the internet things aren't that self regulated.
All we have to do is say that some game is rare on this forum, then wait for the rumors to circulate and the next time the game is on eBay it will go for way way too much. The market isn't reacting to supply and demand, its reacting to pure internet hype based on hearsay and college students' first credit cards.
Certainly CFC2 isn't as easy to get as other NGP games since it was only released in Japan and was a pretty small run, but its not a Ferrari 250 GTO or anything. A great deal of the twits buying the game for $100+ can't read it, and won't learn so the game will just sit on a shelf until they sell it to the next twit.
A classic example is Reversi UK. That stupid, and totally wrong article in that UK mag (the Edge, was it?) gave some crap about how supposedly the game is so rare that only a dozen or so people actually have it. This isn't true. It isn't even close to true. I know of at least 6 people that have had it myself. The game was on clearence at several shops just sitting there for a year or more when all of the sudden people decided it was gold.
However thanks to that stupid article the game is super expensive. I'm glad this happened to Rerversi and not some other (better) game since its nothing to worry about missing out on. I've played it and it kicks my ass big-time anyway. You'd have to be some kind of mental midget to pay $200 for Othelo.
And then there are the games that are far less common than CFC2 that don't go for more than $30. Why aren't they R@RE OOP L@@K? Because no one spread stories about them.