Are there any prices for architectural photography books in the 1970s?

The collection of books in the 1970s is of great value, especially in the early 1970s, because it belongs to a special period in China, is the product of an era, and has obvious flavor of the times. The collection in that period was a unique collection field, which was favored by collectors more and more. Therefore, the books collected in the 1970s are of high value and well preserved, and will become more and more precious in the future.