Ive been starting to hoard these. I like them, each one has coin(or two) unique to the set, and low mintage. Newest one available this wed with a mintage of only 50,000, the enhanced Indians in space Sacagawea, and Crisp 1$, I like the story and history and presentation. Hey before the talks about uncollectable series of the Sacagawea, check the newest redbook prices, and mintages. they sure do have some in the expensive affordable range, such as the Reverse Proof 2016-and 2015 presidents, and all of the enhanced versions Keep going up in value, Ive been hoarding them. sets and the Sacagawea dollars, trying to get a complete set.