What is the value of a 1981 US 100 dollar Federal Reserve Note?

The value of a 1981 US $100 Federal Reserve Note typically ranges from its face value of $100 to about $150 or more, depending on its condition and rarity. Notes in uncirculated condition or with unique serial numbers can fetch a higher premium among collectors. However, the exact value can vary based on market demand and grading. For an accurate assessment, it's advisable to consult a currency collector or appraiser.