What is the value of a 1914 20 dollar Federal Reserve Note?

As of 04/2015 approximate prices are:

Blue Seal -

• Circulated: $55 to $70 depending on the bill's condition
• Uncirculated: $140

Red Seal -

• Circulated: $400 to $1000
• Uncirculated: $2000

DISCLAIMER: The values quoted are market averages as of the date shown, but may be different for an individual bill due to variations in quality and other factors. Also the wholesale (buying) price of a bill will be less than the selling (retail) price. A reputable currency dealer will be able to give a more accurate valuation based on an in-person inspection.