The value of silver dollars can vary greatly, whether it’s the 1964 Kennedy half dollar or the 1922 silver dollar coin. And some rare specimens fetch astounding amounts at auctions.

Like the 1804 dollar, referred to as the "King of Numismatics" for over a century, the 1802 proof Dollars were manufactured in a minuscule quantity, sometime after 1832 and perhaps as late as 1876.