How do you determine the value of a 1976 dollar coin?

Excuse me, I'm curious about how one might go about determining the value of a 1976 dollar coin. Is it simply based on its face value, or are there other factors that come into play? For instance, does its condition, rarity, or any special markings play a role in determining its worth? I'm eager to learn more about the process and any insights you may have on this topic.