Collectible coins refer to coins that are valued for their rarity, historical significance, or unique characteristics rather than their face value. The United States has a rich history of collectible coins, including the Seated Liberty Half Dollar, which was minted from 1839 to 1891. The 1851 Seated Liberty Half Dollar is particularly noteworthy for its artistic design featuring Liberty seated, and it is highly sought after by numismatists. This specific denomination, part of a broader coin series, offers insights into the economic conditions and artistry of its time.