As of 01/2009, a mint-condition 1964 Kennedy half dollar retails for $7 to $8 in grades MS60 to MS63. There are however a few extremely well struck specimens that sell for much more - about $650 to $900.
A genuine 1964 Kennedy half dollar is currently worth about $6. A jumbo coin is surely a novelty, and isn't worth anything to collectors.
Please look at the back of the coin. It must be a half dollar as shown by its denomination, because no circulating $1 coins were made in 1964. There's more information at the Related Question.
It is a common coin and only worth its silver content, which is about $12 at the time of writing.
You probably have a bullion coin and it is worth whatever silver is worth on any particular day. The U.S. Mint did not produce Morgan dollars in 1964.
If you mean it has the "heads" design on both sides of the coin, then it's most likely a novelty coin, available for around $6 at a variety of locations. Since it's a 1964 coin, unless it's a nickel or penny, it may be worth slightly more in raw silver value, but it would depend on what coin (dime, quarter, half-dollar, dollar) it is.
Look at the coin again and post new question. No U.S. one dollar coins were struck in 1964.
A genuine 1964 Kennedy half dollar is currently worth about $6. A jumbo coin is surely a novelty, and isn't worth anything to collectors.
It's a half dollar not a dollar. The coin is very common, most are only valued for the silver, about $12.00
Please look at the back of the coin. It must be a half dollar as shown by its denomination, because no circulating $1 coins were made in 1964. There's more information at the Related Question.
Eisenhower was on the DOLLAR coin in the 1970s. KENNEDY has been on the half dollar since 1964. A 1985 Kennedy half is still worth 50 cents.
It is a coin worth one dollar.
the worth value of the liberty dollar coin is worth 50cents.
It is a common coin and only worth its silver content, which is about $12 at the time of writing.
Check that coin again, because what you described doesn't exist.
The bicentennial dollar coin is still worth one dollar.
You probably have a bullion coin and it is worth whatever silver is worth on any particular day. The U.S. Mint did not produce Morgan dollars in 1964.
If you mean it has the "heads" design on both sides of the coin, then it's most likely a novelty coin, available for around $6 at a variety of locations. Since it's a 1964 coin, unless it's a nickel or penny, it may be worth slightly more in raw silver value, but it would depend on what coin (dime, quarter, half-dollar, dollar) it is.