These are the Most Valuable Items Ever Featured on ‘Pawn Stars’

De Natura Fossilium owned by Isaac Newton – $20k

You could make the argument that Isaac Newton was a pretty big deal in the world of science. So when Newton’s own copy of De Natura Fossilium found its way into the World Famous Gold & Silver Pawn, the Harrison’s had to make their move. The book ended up valued at more than $20,000 but the Pawn Stars team managed to haggle them down to $7,000.