1977 $20 Bill - Should I Sell for $100?

Hello, fellow collectors!

Someone is offering me $100 for my 1977 $20 bill. I’m curious if this is a fair deal or if the bill might be worth even more.

I will provide a photo of the bill for reference. Could anyone share insights about the value of this particular series and whether I should accept the offer or hold out for a higher price?
Looking forward to your advice!

Really? 

I have one too, and it's in much better condition than yours. No fold, but it's B letter NY.

Is this G Chicago note rare?

Is there something wrong with your note?

358 Million circulated. Take the money and run.