How much is a 1980 one dollar coin worth today?

Answer 1

Assuming you mean a American Silver Eagle dated 1987 the value is the same as the spot price of silver at the time of sale, but right now it's $19.23, that's the spot price as type this answer.

Answer 2

The 1980 Susan B. Anthony dollar is still in circulation, the only way it could be worth more than face value is if it's a Proof or high grade uncirculated coin still in the mint package. So if you got it in change or from a bank just spend it.