The condition of half dimes has a lot to do with its value, so remember that the next time you're adding to your personal collection. Unused or undamaged coins almost always have a greater value than those in poor or indifferent condition. Collectors should consider more than just a coin's age to determine its value. The value of a coin depends on many factors besides just how old and how rare it may be. When thinking about market value for a particular coin, always try to assess the demand.