Well, I know the price is high, but your estimates would be on the more "ideal" side... Art books can get up to $50 depending on what the publisher decides, and the Play Arta figures for the other characters are retailing for $130 on the Square Enix store. Also, from the pictures, there might be three steelbooks...? It's difficult to discern.
I agree that art books and statues/figures can go pretty high. The Play Arts Kai figures fetch ridiculous prices with the top notch figures selling for $150 easy. I've bought art books that cost upwards of $60 and most can't be purchased for under $25 if they are decent and 8.5 x 11 dimension-wise.
But I still say they can shove it up their butt. We've gone from the point where really, really great collector's editions with oodles of goodies cost $150 tops (Halo Reach was an awesome collector's set) to the same thing costing nearly as much as a new console....like this.