How much is Sun Hexian's calligraphy worth?

Sun Hexian, a native of Qingdao, 1940, is currently the director of China Calligraphy and Painting Association and the chairman of Qingdao Yihang Carbon Products Co., Ltd., and his works are deeply loved by the public. Participated in many national and provincial exhibitions and won awards. On 20 12, he won the gold medal in the China Painting and Calligraphy Competition on Chairman Mao's birthday, the gold medal in the national painting and calligraphy exhibition to commemorate the 85th anniversary of the founding of the People's Liberation Army in China, the gold medal in the national painting and calligraphy exhibition for the 70th anniversary of the publication of Speech at the Yan 'an Forum on Literature and Art, and the gold medal in the national painting and calligraphy exhibition for veteran cadres, generals, veterans, experts and models. In view of his accomplishments in the field of calligraphy art, he was awarded the honorary title of "China Red Culture Painter".

The value of Sun Hexian's calligraphy is generally worthless, with 300 yuan RMB at most. For reference, I hope the questioner will adopt it.