In Germany we have booklooker.de as a market place for used books. I recently bought an autobiography from there which has out of print for many years. And I found the experience of holding a book in my hand older than myself strangely exciting. That book was printed ten years before I was born. The pages had taken on a yellow shade. Of course I held plenty of really old books in my hand by now. But only then I realized it might become a habit. Especially when there is a choice. You want to read a Mark Twain? Why not by an edition from before the Great War?