What is a 1883 gold Kalakaua I King of Hawaii 1 dollar coin worth?

The $1 dollar 1883 gold kalakaua king of Hawaii is a extremely rare coin. All but 50 of these were made in silver. The 50 gold coins were struck and given to Hawaiian royalty. David Kalakaua, was ultimately the last king of Hawaii. In 1898 Hawaii was annexed by the United States, and in 1900 it became a U.S. territory. On August 21, 1959 it became the 50th American state.

(if you are lucky enough to find one) these gold coins would go between

$8000-$20,000 depending on the condition.