Condition: The overall condition of the coin, including its level of wear, preservation, presence of scratches, toning, or other marks, all contribute to its value. Coins in higher grades (such as Mint State or Uncirculated) are typically worth more than those with significant wear or damage.
Variety: The United States Mint has produced several varieties of quarters over the years, each with its own nuances. There may be variations in the design, such as different mint marks (letters indicating where the coin was produced) or die variations (subtle differences in the design resulting from different die pairs). Certain varieties can be more sought-after and thus command higher prices.
Rarity: The mintage figures for 1817 quarters can vary, and some dates or varieties are rarer than others. Scarcity is a major factor in determining value, as lower mintage numbers typically increase demand among collectors.
Market Trends: The value of coins can fluctuate based on market trends and demand. The interest in collecting specific coins, such as early US coins or historical pieces, can influence their value.
For an accurate appraisal, it is recommended to seek advice from a reputable coin dealer or numismatic specialist, as they can provide a more detailed evaluation based on the coin's specific condition and characteristics.