That is so neat micahshere! I think real world eBay, you wouldn't have a problem getting $60-$80 for that note.
But I think it would be cooler to hang on to it. It would a great conversation piece now that you know it's a legit B.E.P. error! Hey and welcome to the site...

BTW: B.E.P. stands for Bureau of Engraving and Printing. Yea, Yea, websites and TV always get that one wrong! I can't get through a week without seeing a website bunching coins and currency together as being made at the mint. Only coins are made at the mint, and currency and at one time stamps are made at the B.E.P.