The pricing of ebooks is not only a deal between Amazon and other stores.
At least in Central Europe, some publishers sell the most ebooks to libraries. And that makes ebooks expensive, because they're paid by the library. But on the other hand you can get them for free through a library system.
The question is: Is a digital manuscript of a book something you should actually "buy" or is it something you should better get through a library for free (paid by the library).