The Bicentennial half dollar was minted to commemorate the 200th anniversary of the United States Declaration of Independence in 1976. The coins are made from two alloys: copper-nickel and silver. The copper-nickel clad half dollars were minted from 1975-1976 and are worth $4 - $15 today, depending on the specific coin. The silver Bicentennial half dollar coins are worth the melt value of silver, as they are made from 40% silver. The melt value of a silver Bicentennial half dollar can range from $8 - $15, but the coins can also have a collectible value based on their condition.