What is "what 1983 penny is worth $15?

A 1983 penny that is worth $15 would typically be a rare and valuable error coin. Some 1983 pennies that are worth $15 or more include examples with double die errors, off-center strikes, or other unusual errors that make them sought after by collectors. These types of error coins are not common and can command higher prices due to their scarcity and desirability among collectors. It is always recommended to have rare coins authenticated and verified by a professional grading service to ensure their authenticity and value.