The key there is 100 mills. That means the bar is plated with a layer of gold that is 100 millionths of an inch think. Many sellers will use the term clad rather than played, however both mean the same thing. The value of the actual gold is around $0.02. However no gold company will touch these. It cost more to remove the gold plating than the value of the gold. So these bars are only worth their collectible value and have no actual previous metal value.