Even if you know the transaction price of one piece, it cannot represent the price of all works. Because no matter who has good or bad calligraphy, some are valuable and some are not valuable, some are expensive and some are relatively cheap, so we cannot generally say how much it costs. Runge doesn't have any accuracy, it's just a reference. It mainly depends on his own judgment and understanding of his calligraphy and painting, as well as the market hype at the time. At the same time, the price of celebrities is higher than that of ordinary people. As long as it's in good condition, it has collection value. It’s my own opinion, please forgive me if I’m wrong!