Collectible coins encompass a variety of types, including bullion, numismatic, and commemorative coins. The United States offers a range of collectible coins, including dimes, which are minted in various years and locations, such as the 2009 Denver mint. A 10c roll refers to a sealed roll of dimes, often appealing to collectors for its potential to contain uncirculated or special issues. The 2009 dimes from Denver include specific minting characteristics and may hold unique value depending on their condition and rarity.