27Isaac Newton's Personal Copy of "De Natura Fossilium" ($20,000)
Just because we see something on Pawn Stars, does not mean it is true. In other words, we only get to see some of the thousands of items that come through the shop monthly, and some are real while some are fake. Every item has an owner and every owner
claims that what they have is the real deal. That was the case when a copy of the 1546 "De Natura Fossilium" showed up on the counter one episode.
The book came with all the markings and a book plate that certified it was actually owned by Sir Isaac Newton. It was a book that was stored in his library and because of that, had amazing value. The expert told them it was worth $20,000 yet the owner still sold it for $7,000 making it a horrible deal for the seller.