1. Circulation Wear: The amount of wear and tear on the coin significantly impacts its value. Coins with more significant circulation marks, scratches, or damage will be less valuable than those in better condition.
2. Overall Appearance: The overall visual appeal and luster of the coin also contribute to its value. Coins with a brilliant, mirror-like finish and minimal blemishes will command a higher price.
3. Mint Errors or Varieties: Certain rare mint errors or varieties can greatly enhance the value of a 1964 Kennedy half dollar. These errors could include off-center strikes, doubled dies, or overdates.
4. Proof or Uncirculated: Special mint products like Proof coins or Uncirculated coins have a limited mintage and are considered more valuable than circulated coins.
5. Grading: Numismatic grading services like the Professional Coin Grading Service (PCGS) or Numismatic Guaranty Corporation (NGC) can assign grades to coins based on their condition. Coins with higher grades, such as MS-65 or MS-67, will have higher values compared to lower-grade coins.
Assuming the coin is in circulated condition with typical wear and no significant mint errors, the value of a 1964 circulated silver Kennedy half dollar can range from $1 to $5. Coins in exceptional condition or with special characteristics may have a higher value, potentially reaching up to $100 or more.
It's always recommended to consult with a certified coin dealer or numismatic expert to obtain an accurate appraisal of the value of a specific coin.