What is the value of a 100 dollar bill with the water mark of Franklin on the left side upside down with a green seal and a h on the bill serial number AB 60726089D?

Those are neat errors, but they are no extremely rare. As you can imagine, the paper gets fed through the printing press backwards frequently, especially with a watermark. I would expect it to be worth around $150. The real problem is that the note is already worth $100 due to the face value. It is expensive to collect because of that.