Purchasing franklin half dollars in mint condition should be your goal, since the state of a coin is really important to its worth as a collectible. Unused or undamaged coins almost always have a greater value than those in poor or indifferent condition. More factors than just age determine the value of a coin to collectors. The age and scarcity of coins of course affects their value to collectors, but did you know that there are other factors that play a part in assigning value to a given coin?. Coins can be valued by many factors, the most important of which is, of course demand.