How much is the calligraphy of calligrapher Zhang Sheng worth?

The price of Zhang Sheng's calligraphy works is not necessarily

Does the line have strength, rhythm, sluggishness or agility, and is it dignified or frivolous?

Without any basic knowledge, only relying on my poor cognition, instinctive feeling, shallow aesthetics, I feel that every word looks good, and I feel that writing is good. Not all calligraphy can be appreciated for elegance and vulgarity. This is something I can't help, Xu Wei said.