Maybe you just found every coin proof set ever pressed in your parents’ attic, and now you want to know what they’re worth. Chances are, you found yourself a coin goldmine, but before you jump for joy do your research. There are books and online tools that can help you assess the coin proof set values before you take them to a coin dealer who might try to purchase the set for less than it is worth.
The difference between assessing the value of a coin proof set and a regular coin collected is that grade doesn’t come into play as much. Grade refers to the condition of the coin, and the amount of wear and tear it has experienced in its lifetime. Since proof sets typically stay in their display, they are usually in mint condition. Value charts reflect this. As you might have surmised, the older a proof set is, the more valuable it is. However, any set that does not bear the customary S mintmark are also extremely valuable and rare.
To give you an idea, a 1936 proof set is worth approximately $7,000, a 1975-S proof set with no S is worth about $54,000, and a 5-piece 2003-S proof set is worth only about $21. These prices change over time with demand.
Once you have a good idea of what your coin collection is worth, if you are interested in selling it, take the values with you when bargaining with a dealer or buyer. That way you ensure you get the best deal. You can also sell your sets on eBay, where demand dictates the price.