How much is a $2 bill worth?

I'm curious to know, just how much is a $2 bill actually worth? Is it still considered legal tender, or has its value diminished over time? And if so, are there any collectors or investors who might be willing to pay more than face value for this unique piece of currency? I'm eager to learn more about its rarity, history, and any potential financial implications it may hold for those who possess it.