Collectible coins include various types such as proofs, uncirculated coins, and commemorative issues. Proof sets, particularly those from the San Francisco Mint, are highly sought after by collectors due to their high-quality strikes and finishes. The 2022 Proof Set from the United States features coins that include the 10ยข (dime) denomination, among others, and is distinguished by its mirror-like surfaces and sharp details, making it a popular addition to collections. Collectors often value these sets for their limited mintage and unique design elements.