Even if you're not into collecting coins, here's a list of rare pennies you should hold onto if you ever come across them. One of the most talked about is the 1943 wheat penny. Other rare pennies on this list include the 1792 penny, 1793 penny, 1844 penny, 1856 penny, 1877 penny, 1909 penny, 1955 penny, and 1974 penny. I've also included some tips to help you find out the value of your pennies.