The U.S. Mint never issued such a coin. In all likelihood you have a privately-issued commemorative piece. Most of these small items sell for at most a couple of dollars, and the market is fairly limited these days. What you have is a normal 1976 penny that somebody has plated with either silver, nickel, or zinc. Now a novelty item it has no collector value.
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It's worth one dollar.
Your coin is only plated silver. The US mint has never made silver pennies. Plating adds no extra value.
That's a bicentennial dollar, and it's still worth one dollar.
It's just a common bicentennial dollar, worth face value only.
It's a Eisenhower dollar NOT a Liberty dollar and none of the Eisenhower bicentennial dollars made for general circulation have any silver or are worth more than face value. Only Proof and collectors coins sold from the US Mint are worth more.