1.00
The only dollar coins issued in 1980 were made of cupro-nickel, not silver. They're only worth face value.
1 dollar
1980 would make it a Susan B. Anthony dollar, and it's still worth one dollar.
He is asking about a 1980 LIBERTY Silver Eagle. It is a bullion coin that predates (and was privately minted) the American Silver Eagle (1986). The confusion comes from the reverse having the inscription โOne Silver Eagleโ which many know to be synonymous with โone silver Dollarโ. It is not legal tender and is worth its weight in silver and any premium you can squeeze out of a collector.
It is worth about $10 in good condition and about $20 in mint condition.
It's called a Susan B. Anthony dollar rather than a Liberty dollar. If you found it in change it has no extra value, so feel free to spend it.
The 1989 (and all other dates) One Dollar Silver Eagle coins are bullion coins that have 1 ounce of pure silver in them with a value that follows the market price of silver which changes by the minute and right now it's $17.34 per ounce. Because of that the worth of the coin is a little less than spot price at time of sale.
It is worth whatever the silver content is. From my searches it appears it is 1 troy ounce of silver which at the time of writing is worth about $22. However, the price of silver fluctuates on a minute by minute basis.
They contain absolutely no silver, and they're worth one dollar each.
It's a Silver Eagle not a Liberty coin no US coin is called a Liberty. The coin is made from one ounce of silver and the value is whatever the spot price of silver is at time of sale. The value as of 8-28-11 is $41.50.
Not silver. All circulating half dollars struck since 1971 are made of copper-nickel and are only worth 50 cents.