I found an online article about an original that sold for just under 4 million dollars. Here is a note about it:
1804 $1 Original PR62 NGC. It is currently not the most expensive American coin-merely the most famous. Heritage Auction Galleries takes enormous pride in its first public offering of a Class I Original 1804 silver dollar. Possessing a long and historic provenance that extends back to noted 19th century collector Joseph J. Mickley, this coin, graded PR62 by NGC, is one of eight Original Class I 1804 silver dollars known today. Of those eight coins, only five are in private collections, with the remainder in institutional holdings.
As you can see, it seems that all coins are accounted for.. so chance are.. they are a fake.. too bad though. Might be still a really neat pickup to add to a collection.