How much is a 1981 100 bill worth?

The value of a 1981 $100 bill can vary based on its condition, rarity, and demand among collectors. Generally, if it's in circulated condition, it is worth its face value of $100. However, if it's in uncirculated condition or has a unique serial number, it could be worth significantly more, sometimes ranging from $150 to several hundred dollars. Always consult a currency collector or appraiser for a precise evaluation.