Collectible coins often include various types based on their denomination, minting location, and year of issue. In the United States, coins such as the 1 cent (penny) are frequently collected, particularly those minted at specific facilities like the Denver Mint. The 2015 Denver 1 cent coin is part of a series that can attract collectors due to its mintmark and production year. Factors like condition, rarity, and historical significance greatly influence the value of these coins in the collectible market.