The first Sacagawea dollars appeared in the 2000 proof and mint sets. The small golden colored coin promised to revive the $1 coin in commerce, but the public didn't embrace it. Also included in the sets are cents, nickels, dimes and half dollars as well as second year Massachusetts, Maryland, South Carolina, New Hampshire and Virginia State quarters. The proof set features 10 impressive proof coins and the 20-coin mint set includes "P" and "D" Brilliant Uncirculated issues. Now over two decades old, these sets will get harder to find in the future.