The correct answer to this open question is the following.
The approximate value of a Gutenberg Bible today is the following.
During an auction in 1978, one copy of the Gutenberg Bible was sold for $2.2 million. It is very pricy because historians think that from the 180 original copies originally printed by Gutenberg, today there are only 49 in the hands of private collectors or museums. That has made its value to increase considerably. Historians think that today, a copy of this historic book could reach the $30 to $35 million. Without a doubt, it is a collector's item.