I am an avid collector of boxing books and when I started out, I would order books based on title alone. There is little value in that. Try to find out if you're getting a first edition, whether it's in good condition and even better, if the author has autographed. I just received the Earnie Shavers Autobiography, in excellent condition and I found out, to my surprise, that it was autographed by the man himself which increases the value of the book exponentially.