It's not just the cost of production for me, but also that when I buy an ebook I am decreasing the supply of that book in the used book market. This should caus

It's not just the cost of production for me, but also that when I buy an ebook I am decreasing the supply of that book in the used book market. This should cause used versions to be priced more highly, and increase the probability that someone will buy a new book from the publisher.