Are ancient medical books 200 years ago valuable?

Worth some money. Ancient medical books 200 years ago have a long history and are valuable for collection. The medical books written can not only show the medical level and technology at that time, but also show the history and culture at that time from the writing method, which is very valuable for medical personnel and historical researchers. When medical books are woodcut official seals and the author is famous, medical books are even more valuable.