Rule of Economics: No matter how high the price, there's always someone willing to buy it. However, as the price goes up, less people are willing. Just remember: it could sell for five billion, and SOMEONE would still be insane enough to try to fundraise to buy it.
So yes, books sell for those insane prices, to idiots willing to pay more than they're worth for them. But to us SANE PEOPLE, not worth it, even IF it's special limited uber edition. I don't care what special titles you give it, too much is too much is too much, no matter how you look at it.