You have awfully expensive taste in books. There are very few ebooks that cost $25. eBooks typically cost well under $10, except for new releases when the paper book is only out in hardback. Wait for the paperback release and the ebook will fall correspondingly.
You did make a mistake if you were expecting ebooks to be as cheap as 2nd-hand books; that's never going to be the case (except for public domain classics).
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