You know what's weird? Years ago I bought the strategy guide to Shadows of the Damned because, as far as I knew, that was the only place where you could get actual concept art for the game. I paid $1.50. Recently I decided to get the game for a friend along with the strategy guide because it was a dollar fifty, no big loss, but to my surprise you won't guess what happened: the damn strategy guide spiked in price to no less than $50 on Amazon. That is insane. The cheapest I've found it was $30 but the most expensive I've seen was five fricken hundred dollars. Why? The book isn't even printed on glossy paper, it's flimsiest least impressive strategy guide I own.
And here's the thing, let's say the book has in fact become tremendously rare and you can charge a whole lot of money for it; who's going to pay for it? $500 for a strategy guide is ludicrous, an entire council wouldn't cost that much. Why charge that much? You'll never sell it. $30-$40, ok, that's a rare guide, specially for not being a collector's edition, but $500? You're never getting rid of that.