https://www.ebay.com/itm/254195157627?hash=item3b2f364a7b:g:ICkAAOSwrjBZ-s7K - what is the real value of something like this and how is it discovered?
Well, the price is pure fantasy, as often with an error on e-bay. When you think that the sheet that was rolled thin conceivably produced hundreds or thousands of blanks all the same.Or just a few if it was discovered early enough. They are discovered in the normal way, people weighing their coins.