Historical Significance: The Kennedy Half Dollar, introduced in 1964, was minted to honor President John F. Kennedy following his assassination. Coins with historical relevance often have higher value.
Mint Marks: Coins minted in different locations can significantly affect their value. The "S" mint mark from the San Francisco Mint, for instance, can be more valuable due to its lower mintage in certain years.
Rare Variations: Look for unique variations, such as the 1964-D with the "D" mint mark, which was initially thought to be a mistake. These errors or unique issues can be particularly sought after by collectors.
Proof Coins: Special proof versions, struck with high-quality finishes, are often more coveted. The 1964 Proof Kennedy Half Dollar, with its deep, mirrored surfaces, is especially prized.
Minting Errors: Errors during the minting process, such as off-center strikes or double dies, can make certain Kennedy Half Dollars extremely valuable to collectors.
Low Mintage Years: Coins from years with lower production numbers tend to be more valuable. For example, the 1970-D Kennedy Half Dollar is rare because it was produced in very limited quantities.
Condition and Grading: The condition of the coin is crucial. Coins graded higher on the Numismatic Guaranty Corporation (NGC) or Professional Coin Grading Service (PCGS) scales are more valuable.
Historical Context: Coins from years of significant events related to Kennedy or the U.S. government might have additional value due to their historical context.