About 30 casts of the original fossil have been sold worldwide, each for a price of about $100,000.
Both are casts of the original fossils, which were collected in Kansas.
But for institutions or people with deep purses, some original fossils are available that would make any museum curator drool.
The original fossils disappeared in 1941 during World War II, but excellent casts and descriptions remain.
About 30 casts of the original fossil has been sold worldwide, each for a price of about $100 000.
In 1932 von Huene concluded that the original fossils described by Barrois were not necessarily of the same species as the later finds.
Dippy the sculpture was created during a nine-month process from the original fossil, which still stands indoors in the museum's Dinosaur Hall.
The original fossil was found by paleontologists a short distance from Reptile Gardens in the 1970s.
But where were the original fossils?
The original fossils, around which the current collection has grown, were those gathered as part of the California Geological Survey from 1860-1867.