It's a really common coin so the value is mainly for the silver content. At present, it's worth a bit over $10.
The coin isn't solid silver, it is 90% silver and 10% copper. It is a common date and worth only its silver content, which at the time of writing is around $10.30.
1964 Kennedy halves are very common coins that were struck in 90% silver. That fact is the only reason they are worth more than face value. About $12.00.
There were hundreds of millions of Kennedy half dollars minted that year, many of which were hoarded. The only value is for the silver content. At present, one is worth about $10.
It's a common date, currently worth $10 for its silver content.
1964 is an extremely common date for Kennedy half dollars. They have a current melt value of $11 for the silver (as of 12 January 2013).
1964 is an extremely common date for Kennedy half dollars, but the coin is also 90% silver. As of 15 June 2013, one is worth about $8.
One recently sold on eBay for $5.00
A 1969 silver Kennedy half dollar is worth $5 inn perfect condition. The value of the silver is worth $2.87.
A 2002-S silver proof Kennedy has an average retail value of $18.00.
If you check the back you'll find that you have a halfdollar. There has never been a US-issued Kennedy silver dollar.
The 1969 Kennedy half dollar is only 40% silver with a value about $3.25
About $6 for its silver content
The coin is 40% silver and has a value of about $2.00 only for the silver.
If the coin is a 1996-S Silver Proof Kennedy Half dollar, average retail value is $12.00 to $15.00
The coin has no silver and is just face value, spend it.
If the coin is a US Kennedy half dollar dated 1974 it has no silver in it and is face value.
Please, turn the coin over and look at the denomination on the back. It's a HALF dollar, not a dollar. The 1964 Kennedy half is a 90% silver coin, but very common. The value would be only for the silver, about $15.00 as of 9-1-11.
It has no silver and is just 50 cents, spend it.
About $15.00, retail.