The Gutenberg Bible is probably the most famous book in Western civilization--the first book printed with moveable type. There are 21 complete copies of the 42-line Bible in existence (it's called "42-line" because each page has 42 lines of type). A damaged copy was purchased in the 1920s and single pages were sold. In March one page auctioned for $54,000 at PBA Galleries in San Francisco. The last complete copy sold in 1978 for $2.2 million. Some say a complete copy would be worth over $25 million today.