How much is the prologue of Shan Ye's Romance of the Three Kingdoms worth?

The paintings and calligraphy of the same person cost 10 yuan or 20 yuan a square foot, some value 100 yuan a square foot 50 yuan, some value 1000 yuan/square foot, some 2000 yuan a square foot, some may be 3000 square feet, or even 10000 or tens of thousands of square feet. Moreover, changing to another auctioneer or intermediary is another situation, which is not easy to judge and is not an absolute price. Any personal evaluation is only one-sided and personal. Unique, celebrity and favorite buyers all want it, which may make the price higher.