20 Dollar Bill With An After The Serial No. How Much Is A Double Printed 20 Dollar Bill Worth?

How much is a double printed 20 dollar bill worth? - 20 dollar bill with an after the serial no.

It is not wrong, and the back is printed in the rule. But while the front is printed twice, slightly offset. The Printer Dock bill, the Treasury seal change serial numbers and color 20 is printed twice. Does anybody know how much it is worth, or the best place to move the item, if they sell anything worth doing. Any help appreciated.