Nice. That's one of the drawbacks to the advent of e-books; it will put an end to used books if they take over completely.
I've been perfectly able to get obscure horror books for my kindle for a reasonable price. My original 1978 Penguin copy of Dracula isn't going to disappear because of it either.
Actually I seem to have been buying nothing but horror novels for it for the last several months, a lot of books I'd been meaning to pick up or hadn't bothered to before, all for less than the paperbacks go for in stores, a lot of the classics being given out for free from Amazon.
Which makes me regret buying the entire Varney Compendium for £30 (~$60) considered the thing is so damned huge and the Kindle version is free...