Any personal evaluation is only one-sided and personal. Personality, uniqueness, celebrities and favorite buyers may make the price higher. But if it is the same, imitation, or just because someone has a job now, or pure hype, the price of calligraphy and painting will be high; Then when he retires, or no one is speculating, the price will soon come down, even worthless. The same is true of any other works of art, as long as there is no problem, they are all collectible. What is special here is that Runge is an unreliable reference, mainly depending on the market and my own understanding of the work, as I said above. There are also imitations, printed matter and line drawings that are worthless. Besides the famous works with a long history, celebrity imitations are worth a little money. I'm sorry, but I still have to make up my mind. What others say can only be used as a reference. My own opinion, please forgive my mistake.