Kennedy half dollars minted between 1965 and 1970 are bountiful in our society even today. There was a great demand for these coins following the assassination of the former President in 1963. However, you can still get about $2 for every half-dollar Kennedy coin minted between 1965 and 1970. This is because the coin's composition changed from about 90% silver in 1964 to only about 40% silver after the fact. The rising price of silver was a big part of this change, but the alteration has now made some of these Kennedy half-dollars worth at least $2 apiece. This is the kind of coin that it wouldn't be too shocking to discover that you have in your collection. Thus, you might want to look over your coins and see if you have a few coins worth about $2 a piece now.