Well-worn: A heavily circulated 1951 Liberty half dollar in poor condition may be worth around its silver value, which fluctuates with the current market price of silver. As of February 2023, the silver value of a half dollar is approximately $7-$8.
Lightly worn: A 1951 Liberty half dollar with noticeable wear but still legible details might be worth slightly more than its silver value due to numismatic (collector) interest. It could fetch around $10-$15.
Uncirculated: An uncirculated 1951 Liberty half dollar in excellent condition, with sharp details and no visible wear, could be worth significantly more. Depending on the specific grade assigned by a professional coin grading service like the Numismatic Guaranty Corporation (NGC) or Professional Coin Grading Service (PCGS), an uncirculated 1951 Liberty half dollar can range from $20 to several hundred dollars.
Mint marks: The mint mark can also affect the value of a 1951 Liberty half dollar. Coins minted in Philadelphia (no mint mark) are the most common, while those minted in Denver (D mint mark) or San Francisco (S mint mark) are slightly rarer and may command a higher premium.
Rare varieties: Certain rare varieties of the 1951 Liberty half dollar exist, such as the "Proof-Only" variety minted solely for collectors. These varieties can be significantly more valuable than the regular business strike coins.
To accurately determine the value of a specific 1951 Liberty half dollar, it's best to consult with a professional numismatist or coin dealer who can assess its condition and rarity accurately.