A gold coin from 1899 is inherently valuable due to gold content. A United States Liberty Head $10 coin has almost a half ounce of gold, which is worth almost $600, as of 2015. A $5 Liberty Head coin has half the gold content and half of the value.
The numismatic value of a gold coin varies depending on the condition, mint mark and date. A coin collector typically pays more than the intrinsic value inherent to the gold. The 1899 Liberty Head $10 coin is worth only slightly more than the price of gold due to high issue. The United States Mint issued more than 1 million of these coins, and they are considered to be common.
The United States Mint issued several other gold coins in 1899. A $2.50 Liberty Head coin has a gold content of 0.12 ounces. Only 27,200 of these coins were struck, so the numismatic value is typically more than double or triple the gold value. The $5 Liberty Head coin was struck more than 1.7 million times. Examples of it in gem condition are quite rare, and they have sold for several thousand dollars.
The $20 Double Eagle was the largest circulated gold coin in the United States, which weighs almost 1 ounce. This coin is relatively common in lower grades, but it still tends to sell for more than the price of gold. In the best conditions, the $20 Double Eagle coin from 1899 has sold for $7,000 to $9,000.