Mint Mark: The mint mark on the coin indicates where it was minted. Half dollars minted in Philadelphia (no mint mark), Carson City (CC), or New Orleans (O) have different values. Carson City mint coins generally command a higher value due to their lower mintage numbers.
Condition: The overall condition of the coin plays a significant role in determining its value. Factors such as wear, scratches, and luster affect the grade of the coin. Coins that are well-preserved and have a higher grade are generally worth more.
Rarity: The mintage number of the 1880 half dollar also influences its value. While many 1880 half dollars were minted, some dates and mint marks are rarer than others. Rarer coins, especially those with low mintage numbers or errors, can command higher prices.
Generally speaking, an 1880 US half dollar in good condition can be worth around $10 to $20. However, rare varieties and coins in exceptional condition can be worth significantly more. If you have an 1880 half dollar and are interested in its value, it's recommended to consult with a reputable coin dealer or numismatic expert for an accurate appraisal.