Is Ling Haitao's calligraphy collectible?

Yes Ling Haitao, a painter of Bu 'erxuan, is the winner of the 3rd National Advanced Seminar on Chinese Culture Cultivation and Calligraphy of China Calligraphers Association, the 14th National Advanced Seminar for Young and Middle-aged Literary Talents of China Federation of Literary and Art Circles, and the first prize of the 4th Lanting Prize, the highest prize for China's calligraphy creation.