As of 08/2008:
Halves dated 1964 are worth about $7. They're 90% silver.
Halves dated 1965-69 are worth about $2.75. They're 40% silver.
Halves dated 1971 and later are worth exactly 50 cents. They're made of cupronickel.
In circulated condition, around $12.50.
All US half dollars from 1964 to date have Kennedy on them, your 1995 half dollar is face value.
It is worth about 10-15 dollars.
about 5 or 6 dollars
1964 is a common date, but it's 90% silver. At present, a '64 half is worth a little over $10.
1964 is an extremely common date for half dollars. At present, they're worth around $11 for their silver content.
A 1963 JFK half would be a spectacular find because none were minted. His picture was put on the half dollar in 1964.
1964 half dollars are 90% silver, currently worth just under $9. Then halves dated 1965-1970 are 40% silver, worth about $3.50 (as of 6 May 2013).
1964 proof Kennedy half dollars are not hard to find. Average retail value is $10.25 for most examples.
John F. Kennedy's portrait has been on all circulating US half dollars since 1964.
1964 is a very common year for Kennedy silver half dollars. Even uncirculated coins are valued only for the silver they contain, about $8.00 as of today.
It varies by year. 1964 half dollars are 90% silver and worth around $12. Those minted from 1965-70 are 40% silver and worth around $5. Anything 1971 or later is only worth face value.
All US half dollars dated 1964 and prior are 90% silver (worth about $11 in scrap silver) All US half dollars dated 1965-1970 are 40% silver (worth about $5 in scrap silver) All US half dollars dated 1971-present that are circulating contain no silver and are only worth 50 cents. (The US does strike commemorative half dollars and proof silver half dollars for collectors but these are almost always found in mint packaging, not as a loose half dollar).