How much is a million dollar bill worth?

Answer 1

Million-dollar bills are an urban legend.

Since the US has never printed a $1,000,000 legal tender bill, any such "currency" is a privately-made novelty item so it's worthless except as a curiosity.

The largest genuine US bill was the $100,000 bill, used in the 20th Century for Federal Reserve Bank transfers. The largest bill that circulated was the $10,000 bill.

Modern US currency is no larger than $100.