The price of Gu Dianzhang's calligraphy works

There are some calligraphy works by Gu Dianzhang in the museum ... I am a member of Xiamen Young Calligraphers Association. I haven't reached the age of 18, so I don't have a certificate ... the current price ... the average work should be around 50 thousand yuan. The more valuable works should be between 800,000 yuan and 200,000 yuan ... the bigger ones will be a little more expensive. ...