Neat - a reason for the (we/me) new-bees to get the books - the first 6 trades I had were for my Riviera 99's that I won after hitting 4-Kings on let-it-ride. Acording to the helpful strike members (before I joined) one for one was fair.
So buy the books and be aware that many do if given the chance take advantage. I even remember given the oppertunity to trade my Opera for two Tunica Sam's.