It's a business. They'll charge what the market will bear. Why wouldn't they? It's the last of an incredibly popular series, isn't it?
It's not Bibles, first-aid manuals, or schoolbooks they're talking about. It's entertainment, not a necessity item.
Besides, that price will surely drop a few months down the road.
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This notion reminds me of the music industry complaint about Napster -- that illegal downloads take money away from the musicians (true), and that they reduce the money the record companies have to invest in new artists. I don't know how true that is, but it would be equally true for publishers, I'd guess. (There are some VERY good people here who would know.)
So, then your thirty-five clams might help create a publishing opportunity for one of us unknown shmoes. Does that help?