Collectible coins from the United States, such as the 1980 Denver mint coins, are often sought after by numismatists and investors alike. These coins may include various denominations and types, including dollars that can be packaged in rolls, typically containing 20 coins. The Denver mint is known for producing high-quality coins and may have unique mint marks that affect their value and collectibility. The condition, rarity, and demand for specific years, such as 1980, play crucial roles in determining market prices.