Most pennies from 1943 were made of steel due to copper shortages in World War II, but a few bronze ones slipped through the minting process. Only a handful of these bronze pennies exist—fewer than 20 ...

As with just about any asset, a coin’s value is determined by its market demand. This means that coins in short supply often see higher demand — and higher values. With coins, supplies are limited ...

The U.S. Mint released the 50 State Quarters Program from 1999 to 2008, featuring unique designs representing each state. While most of these quarters are worth their face value, a few rare issues ...