I saw a rain-soaked and wrinkled (not to mention stained) copy of a rare book of poems bring $600 on eBay while a good copy (torn spine but that's normal for this title) usually gets $300. But being cheap, I waited and found a very good copy for $30, with no torn spine. An old author, not Bukowski, but it shows how people will bid up a shabby copy of a book they really want.