I have four Devil's Face 1954 $50 notes, two are Coyne/Towers in F condition, they are soiled and fairly worn. I have two more one is Coyne/Towers and the other Beattie/Coyne in VF condition. I was thinking of spending them since they are not in very high condition. They are not replacement notes either, just common serials. Should I just spend them or could I get more than face for them? On average the book value of these notes says they are worth about $100-140. Also to sell you would only get 60% of book value which doesn't seem to leave much profit over face, maybe $20?