What is the value of 1986-s pr70 dcam statue liberty silver dollar coin?

If you mean a 1986 Statue of Liberty Centennial half dollar? This coin was struck in copper-nickel not silver. The Denver Mint coin is uncirculated and the San Francisco Mint coin is proof. Both have the same retail value of $6.00.

A 1986 Kennedy half dollar is just 50 cents.