What is the seal of the old Shoushan stone? Is it valuable?

The seal is "Autumn Moon in Pinghu", which can't be wrong. One side is a flower, and the other side is a word: B is not an autumn moon, but a stone looks like it. It is difficult to judge the age value. Generally speaking, it is a leisure chapter of literati. There is Deng Shiru in history. His seal cutting is very famous, but I'm not sure if it is his work.

Deng Shiru (1743— 1805) was born in Huaining, Anhui. Seal engraver and calligrapher in Qing Dynasty, founder of seal engraving of Deng School.

At the beginning, Yan's name was stone statue, which avoided the taboo of Emperor Jiaqing, so he used the line character, and later he became more stubborn. Because he lives at the foot of Wangong Mountain, he is also known as Taoist priest, Wanbai Mountain, Feng Shui fisherman and Longshan firewood, and he is not very good at seal cutting. He lived in Jinling Mei's house for eight years, copying rare stone books collected since Qin and Han Dynasties. He studied four-body calligraphy, especially seal script, with Qin Lisi and Tang Liyang Bing as his ancestors and a little Li Yi, so he was called a masterpiece. Honest and clean, travel around famous mountains and rivers, and be self-sufficient in books. There is "Wanbaishan people seal cutting occasionally".