Some books on my wishlist are super cheap right now at Amazon.
The Infinite Blacktop: A Novel is 99 cents (I loved the first two surreal noirish mysteries in the series)
The Tombs of Atuan by Ursula Le Guin is $1.99 (I think I've read every other books in the wonderful series--I read them as an adult, and like Dune and LoTR, they totally live up to their fame) (but boy, that Ghibli film based on the series was disappointing)
The Best American Comics 2012 is $1.99 (352 pages)
The Best American Comics 2017 is also $1.99 (400 pages)