What is the value of a 1900 for 20 gold?

The value of a 1900 coin, often referencing a specific coin like the 1900 Liberty Head or similar, can vary based on its condition, rarity, and demand among collectors. If you're referring to "20 gold," it typically means 20 gold coins or a weight equivalent in gold. To accurately assess the value, one would need to consider the current market price of gold and the specific coin's numismatic value. Please consult a numismatic expert or a reliable marketplace for precise valuation.