Here are some of the specific reasons why manuscripts were so expensive:
* Materials: The materials needed to make a manuscript were expensive. Parchment, which was made from animal skins, was the most common writing surface. It was expensive because it was time-consuming to prepare and required skilled labor. Other writing surfaces, such as vellum (a finer quality of parchment) and paper, were also expensive.
* Labor: The labor involved in writing a manuscript was also expensive. Scribes, who were skilled writers, were paid high wages. The amount of time it took to write a manuscript varied depending on the length of the text, the complexity of the illustrations, and the skill of the scribe.
* Illustrations: Many manuscripts contained elaborate illustrations, which added to the cost. The illustrations were often painted by hand, and they could be very time-consuming and labor-intensive to produce.
* Binding: The binding of a manuscript also added to the cost. The binding was often made of leather or wood, and it was often decorated with gold or silver.
As a result of all of these factors, manuscripts were very expensive in the early fifteenth century. Only wealthy individuals and institutions could afford to own them.