Collectible coins, particularly from the United States, encompass a variety of types, including commemorative coins, bullion coins, and proof sets. The 2021 Proof Set, for example, includes coins that have been specially struck for collectors, known for their high-quality finish and clarity. The One Dollar coin is a notable example, often commemorating significant figures or events in U.S. history. These coins can vary in value based on mintages, demand, and condition, making them appealing to both novice and expert collectors alike.

Item Denomination Series Year Mint
2021-S $1 American Innovation Proof Set 4 Coins $1 (One Dollar) Proof Sets 2021 San Francisco