When my father passed away in 1998, he was just about ready to place an order for the 2nd printing of the 2nd edition of his book Winning Strategies for Video Poker.  It was with a little bit of trepidation that we went ahead and ordered the full 2000 copies.  I'm not sure how many copies were sold in total before he passed away, but based on what records I can find plus the fact that the full 2000 sold out and I have had it reprinted yet again, I'd say it is fair to say that somewhere between 10,000 and 20,000 copies were sold, which is absolutely remarkable for a self-published book from what I'm told.