Collectible coins encompass a range of numismatic items that attract enthusiasts and investors due to their historical significance, rarity, and artistic design. In the United States, collectible coins can include both circulating currency and specially minted pieces, such as commemorative coins, proof coins, and silver and gold bullion. The Two Pence coin, while not used in the U.S., refers to a denomination in British currency, exemplifying how international coins can also be collectible, often valued for their design, age, and limited mintage. Collectors focus on factors like condition, grading, and market demand when assessing the value of both U.S. and international collectible coins.