After a trial period with 500 slotless machines in Bally's, PP execs determined to buy 15,000 more. Retrofitting existing machines will cost from $600 to $2,000. Review/Journal story link below. While this makes good sense with the nickel and probably the quarter machines, I for one want to hear the solid clank of the dollars hitting the tray. (Even if it is the clank of just two tokens )