How much is Liu Yiwen's calligraphy worth?

Mr. Liu is the former curator of Shanghai Museum and a master of calligraphy. The so-called pen master is much better. Keep it well and don't sell it. They have no real value yet. Now it can be speculated that it was "tiles" that betrayed the fire, but: "Two Cao Ming died behind him, and the river was abandoned forever." Those "tiles" will eventually be eliminated by history and future generations