The 11-year program, "the 50 State Quarter program," ran from 1999 to 2008, during which each state was given a specific quarter design. Most U.S. state quarters retain their original value of $0.25.

You might be sitting on a coin collection that's quietly losing potential worth while you read this. The 50-State Quarter program captured American hearts from 1999 to 2008, with roughly half the ...