Monty's Cash Register

Monty's Cash Register is wherein a couple had to punch keys on a 15-key register. Exactly 13 buttons hid amounts of either $50 or $100 and 2 were marked "no sale", and getting to a stated amount (usually $500–$1,000) won a grand prize. Stewart marked off any buttons hit so they could not be used again. The couple could stop at any time and keep what they have (always then being tempted with a follow-up keep-or-trade deal), but hitting "no sale" at any time ended the game and cost the couple any and all cash accumulated up to that point. If a couple chose a "no sale" button on the first try, hitting the second "no sale" button the very next time also won the grand prize. Otherwise, Hall allowed the couple to take home whatever dollar amount they hit with the next key punch; sometimes he would double the cash they got (if they hit $50, they got $100; if they hit $100, they got $200). In the 2009 version, the game is played using a board of fifteen numbers, thirteen with cards marked either $200 or $400, and the remaining two are Zonks.