How much is a 1976 US 2 dollar upside down one in the series worth?

A 1976 U.S. two-dollar bill that is printed upside down is considered a printing error, which can increase its value to collectors. While standard 1976 two-dollar bills are worth face value, an upside-down version can be worth anywhere from $50 to several hundred dollars, depending on its condition and the specifics of the error. It's important to have it authenticated by a professional to determine its true market value.