The paperwork that was included with these coins describes them as follows:
This historic coin is a valuable memento of an era in American history when pioneers were challenging the West. The silfer in this dollar was mined from the rich Comstock Lode, discovered in the mountains near Carson City, Nevada. The Carson City Mint was established there in 1870 and although it was in existence for a mere 24 years, it produced many coins which have endured as collectors' items, among them the 13 piece Morgan dollar series of 1878-1893. Their link with an historic period in our nation's history gives these dollars an added appeal.
This coin is an uncirculated specimen of the Morgan dollar, containing 90% silver, which somehow survived the massive coin ments of the early 1900's. They were discovered by a Treasury audit in 1964, after nearly a century of obscurity in the vaults.
This issuance by General Services Administration of the last of the uncirculated Carson City dollars will serve for millions of Americans as cherished mementos of a colorful era.

Individually numbered certificates are included with each coin.

The 8th Edition (1999) of the North American Coins & Prices lists these coins as follows:
1882 MS-64 $100 MS-65 $290
1883 MS-64 $91 MS-65 $220
1884 MS-64 $90 MS-65 $220
On Ebay:
Ended May 4th 1882 $165 Ebay Item # 3910424909
Ended May 4th 1883 $142.50 Ebay Item # 3910424989
Ended May 4th 1884 $165 Ebay Item # 3910425089

I am offering these as a 3 coin set for $435 USPS Priority postage included.
Please email me if interested.
Best Regards,
Murph