These shocking Pawn Stars discoveries are the definition of priceless. For this list, well be looking at some of the most shocking and amazing items to ever make their way onto Pawn Stars. Our countdown includes the Book of Mormon, George Washington's suit, JFK's humidor, and more! What do YOU think was the most shocking Pawn Stars discovery? Let us know in the comments!Watch more great Pawn Stars videos here: Top 10 Times the Pawn Stars Were Screwed Over -