How much is Liu's painting a foot?

The average price of Mr. Liu's handwriting this year is about 3 1000 square feet, because this year's handwriting of Mr. Liu is collected by many museums and other cultures. If it's an ordinary transaction, it's almost 20 thousand. If it is a tour or auction, it will cost 3 1000 square feet. My family has relatives in the Calligraphers Association. It is suggested that it is more cost-effective to collect Mr. Liu's calligraphy and painting now, because it will be 1 to 3 years in the future.