Do you have a lot of used bookstores in India? That's where I often purchased many of my books and sometimes they were in excellent shape. But that had a lot to do with the fact that they were made so well back then (except the very, very cheap detective "dime novels"). You would often never know someone had read them before. On the rare occasion I had the money to buy one new I treated it like gold, then sold it to the used store and would get two or three newly used ones in return.