These coins, both the proof and business strike versions, contain 0.764 troy ounces of silver. They are worth their weight in silver.
To compute value, multiply the current price of silver (from kitco.com) by 0.764. Say, by way of example, that silver is selling at $15 US dollars per troy ounce. The value of this coin would be 0.764 x 15 = $11.50. If your particular coin is in excellent, fully uncirculated condition with great eye appeal, a premium of a few dollars can be added to the basic silver value.