Collectible coins include a wide range of numismatic items, focusing on historical value, rarity, and condition. The United States issues, such as the 1838 Coronet Head Cent and the $10 Ten Dollar gold piece, are particularly sought after. The Coronet Head Cent featured Liberty's portrait and was minted during a time of significant changes in U.S. coinage. The $10 gold coins, often referred to as "eagles," represent important periods in American history and are valued for their gold content and collectible appeal.