It is widely acknowledged that precious metal content is only a relatively small factor in determining the value of many rare U.S. coins whose value is almost solely based on condition, demand and rarity.
The most profitable period for the U.S. rare coin market was between December 1975 through to March 1980. The market registered an increase of 1,195% which coincided with a period of weak U.S. economic growth, high inflation and rising gold prices.
The coins with the best track records as money-makers are those with the lowest mintages and those in the highest levels of preservation – in other words, those with the greatest rarity and quality.