There are currently 522 World Coins, from over 106 different countries, for sale here. The most recently added coin was the 1918 Mexico 20 Peso Gold Coin - KM. 478 - About Uncirculated for $979. Currently the most expensive coin listed is the 1833 Italian States, Sardinia (Genoa Mint) Silver 5 Lire KM.130.2 - NGC AU 53 at $579. In addition to shopping by country below, you can also shop just our Certified World Coins.