What is the value of a 1971 silver Liberty half dollar?

50 cents. It's not silver and not a Liberty half:

> The last circulating silver half-dollars were dated 1969. These were made of a 40% alloy and contained about 1/7 of a troy ounce of silver. Starting in 1971 halves are made of copper-nickel just like dimes and quarters.

> It's called a Kennedy half because it carries a picture of JFK. The only coins called "Liberty" coins are those that have a picture of Miss Liberty on the front side. The last Liberty halves were struck in 1947.