Yet the smallest pieces can garner the biggest interest. Antique mechanical coin banks broke onto the scene just a few years after the Civil War and are one of the most valuable cast iron ...

Although they're meant to hold pocket change, vintage piggy banks can be worth some serious money. If you're out thrifting, ...

The U.S. Mint also produced a series of bicentennial quarters to commemorate the event — and many of those now command great sums of money as the country approaches its 250 th birthday.