They are 50 cents, spend them.
2.
Face value only.
A Mint State 1971 Kennedy has a retail value of $1.00-$2.00
Face value only.
100$
Kennedy Half dollars are very common, coins from 1971 to date contain no silver and are only face value.
A proof coin has a retail value of about $1.00
50 cents.
Next to nothing.
25 cents
One dollar.
$50