When you buy from ebay, make sure you ask the Seller if it's from a smoke-free home. Otherwise, you'll get burned with stinky (and I do mean reeking!) books. The combination of an old musty book + decades of smoke = a very bad smelling book! (And no, the schmuck wouldn't give me a refund. It was expensive, too!)
Used bookstores are better because you can at least sniff the books before you buy.