For example, the most famous cursive script in history is Huai Su's. It's no exaggeration to say that a word is worth a thousand dollars, but who has seen the original Huai Su being auctioned?
For another example, who auctioned the handwriting of Zhao Puchu, a contemporary calligraphy master? I've heard that someone asked an expert to identify the original, and once evaluated it: 20 million yuan per square foot. However, personally, this is only an estimate. Zhao Puchu's inscriptions or poems abound in the famous temples I have been to, such as Pinge introduced from Wuyishan and the word "Wuyi scenery", which is really comparable to Wang Xizhi's "the best in the world" (Shanhaiguan). Ironically, under this flat forehead, there are actually many famous inscriptions. Compared with Pu Zhao's old words, these inscriptions are simply a Chun Xue.
In a word, if it is the original work of Master Hongyi, first of all, it is priceless. Second, I suggest you donate it to the temple for preservation. This kind of charity is not only a financial charity, but also a legal charity, and its merits are boundless.