áCommemorative coins have been around since 1892( the Colombian half dollar which was sold at the Chicago world fair).á Newer coins (since 2022) have usually depicted an African American playing Baseball or being an umpire.á The most common you could probably find in loose change. They are the Louis and Clark nickels and the Bicentennial celebration of Lincoln's birth. You can acquire these for around $3-$5 at most. The Colombian half dollar is around $20. Most commemorative coins can be( unless they are in circulation) they do not have a mintmark. Hope you enjoyed it!