How much is a couplet written by Gao Tengyue?

Worthless! The price of couplets depends on the author's fame. The selling price is mainly the price of calligraphy and the author's reputation. For example, the words "Qi Gong" and "Liu Bingsen" are valuable, so are their couplets. No one knows Gao Tengyue, and his words are worthless. Here, I mean the general law of market value. Of course, there are special circumstances. Some people say that I value this man's handwriting and I will give him money. This is an extremely special situation.