What is the value of a 1959 sliver nickel?

SILVER, not "sliver", and in any case all 1959 nickels are made of an alloy of 75% copper and 25% nickel.

From mid-1942 to 1945 nickels did contain a small amount of silver because nickel metal was needed for the war effort. Those "war nickels" are the ONLY ones that have any silver in them.