What this coin looks like (obverse, reverse, mint mark location, special features, etc.):
These are very rare and special varieties of the 2000 P Sacagawea Dollar. The obverse of the coin (Sacagawea portrait) was originally designed by Glenna Goodacre. When the coin was originally being designed - invitations were sent out to 23 prominent artists and sculptors to come up with a design for Sacagawea. Goodacre's design was chosen and she received a $5000 commission for her work - and the $5000 payment was received in 5000 special Sacagawea dollars. (Thomas Rogers designed the eagle on the reverse of the coin but did not receive a special commission because he was already an employee of the US Mint.)
The Mint Director Phil Diehl personally delivered these 5000 coins to Glenna Goodacre at her Santa Fe studio in New Mexico. These coins were extra special and were different than the rest of the 2000 Sacagawea Dollars. These coin themselves were struck on burnished planchets by polished dies using higher pressure - which resulted in a proof-like surface. They were also treated with an antioxidant to help preserve their special appearance.
Goodacre immediately sent all 5000 coins to the Independent Coin Grading Company (ICG) in 2000 to have them certified and sealed in order to preserve them. Each coin was individually numbered and Goodacre had the numbers 2003 through 4999 sold to the public for $200 each while she kept the remainder for herself.
In 2010 - A dealer Jeff Garrett of Mid-American Rare Coin Galleries acquired the remaining coins from Goodacre. These ICG-graded coins were sent to PCGS and put into plastic holders with a special label bearing the signature of Philip N. Diehl - the Director of the US Mint at the time Goodacre designed the coin. Some of these coins have been signed by Glenna Goodacre herself - with the signature featured on the outside of the plastic holder.
Coin valuation chart: Typical coin prices, values and worth per grade or condition - in USD