Condition: The condition of the coin is crucial in determining its value. Coins that are well-preserved, with minimal wear and tear, are more valuable than those that are heavily worn or damaged. The Sheldon grading scale is commonly used to assess the condition of coins, with grades ranging from 1 (poor) to 70 (perfect).
Rarity: The mintage of the 1886-D five dollar gold coin was relatively low, with only 18,565 pieces produced. This makes it a relatively rare coin, which can increase its value.
Numismatic Value: The numismatic value of a coin refers to its historical significance and desirability among collectors. Coins with interesting mint marks, errors, or unique characteristics can have higher numismatic value and command a premium price.
Based on these factors, the value of an 1886-D five dollar gold coin can range from a few thousand dollars to tens of thousands of dollars. It is important to consult with a professional coin dealer or numismatic expert to get an accurate appraisal of the coin's value.