The US Mint makes commemorative coins annually. These coins are often well advertised and active collectors would recognize most of them if they saw them at a coin shop. But there are entire series of commemorative coins that most collectors will never see unless they actively seek them out.
In 2007 the mint started producing the presidential dollar series. In this series they release one coin for each president (for presidents who served non-consecutive terms the get two separate coins). The US Mint releases 4 coins per year. As a companion to that series they release the ”first spouse” series. These coins have a $10 face value and are one half ounce of .9999 fine gold.
Some of the presidents were not married at the time of their presidency. Most of these coins have a depiction of a classic US coin. There was an odd exception when in 2012 Alice Paul was placed on a coin.
The first year of the coins saw mintages averaging around 18,000 for proofs and 17,000 for BU coins. The mintage dropped significantly in year two, with proofs averaging 7,000 and BU averaging 4,000. The most recent mintages are even smaller with mintages under 2,000 for BU coins and under 3,000 for proofs.
Most every coin from this series trades at or near the gold prices, despite the low mintages.
In 2009 the mint made a one time issue called the Ultra High Relief. It is exactly one ounce of gold. The coin is unusually small in diameter but thick. It has the design of the St. Gaudens $20 High Relief coin. The mintage exceeded 114,000 pieces. The popularity, however, has kept the coin trading well above the price of gold. Currently gold is around $1150 per ounce and these commemorative bullion coins are trading near the $2,000 range.
This may become a trend. In 2015 the mint produced a different high relief coin. It has a completely new design and is also one ounce of pure gold. The coin had mintage limited to 50,000 pieces. These coins were issued around $1500 and are trading around $1,800 as of this writing. This coin has a face value of $100, making it America’s first $100 gold coin.