The ‘collectible’ book market on Amazon is pretty interesting. A few years ago I thought I’d get a friend of mine a copy of one of my favorite monographs by Erwin Olaf, and I was stunned to discover that it was over $1000.00 on Amazon. There appear to be a small number of gamblers who like to buy books and then list them for high prices so they can score a tidy windfall if it turns out someone wants them that badly.