How much are Shang Shouzhen's paintings and calligraphy works, how to identify them and how much are they worth?

Tens of thousands, but the same and different calligraphy and paintings have different prices in different people's eyes, but no matter whose calligraphy and paintings are good or bad, there are valuable and worthless, expensive and relatively cheap, so we can't talk about the square in general, we can only say how much a picture is. Runge also has no goal.