Editing Card Sharks (section)

====Rule changes====
Duplicate cards were originally counted as incorrect guesses, in the same manner as in the main game. Starting on October 20, 1980, a duplicate in the Money Cards rounds was regarded as a "push"; the contestant did not lose their wager, and moved to the next card. The "push" rule remained intact until late in the 2001 revival's run. In the first season of the 2019 revival, a duplicate card was treated as an incorrect guess; in the second season, it was again treated as a push.

Initially, contestants could only change their base card on the bottom level of the board, at the start of the round. This was later altered to allow the contestant to change the base card on each new line of cards if they so desired.

During the 1986–89 version, three extra cards (known as "spare cards") were positioned to the left of the Money Cards board. These cards could be used initially any time to change an undesired card, even to change the same card multiple times, but during the run were later amended to allow only one change per line at any point in the line. The additional amount awarded for moving to the second line increased from $200 to $400. This changed the maximum potential payout to $32,000.

On the 2001 series, each winning contestant's score from the main game was divided by three; therefore, players started the round with $700 to wager with and that amount was added to their score once they reached both the second level ''and'' the Major Wager, which was a ''Card Sharks'' first.

Players can change exactly one card, anywhere on the line, in the 2019 version.