Some Canadian 1-dollar coins are worth much more if they are rare or prized by collectors. One of the very most collectible ...

According to International Precious Metals, only 2,000 were produced, and even fewer are known to exist today—hence their hefty worth. One of these coins once fetched $6.6 million at auction, while ...

The U.S. minted about 7.7 billion pennies in 1983 but only about 5,000 of them have the doubling error. The mistakes and the rarity is what drives the price up, with some of the coins, known among ...