Which is more collectible, Liao's paintings or calligraphy?

Which is more collectible, Liao's paintings or calligraphy? Mrs Liao and Mrs Xu Beihong. Born in Changsha, Hunan Province, 1923. She has never studied painting professionally, because under the influence of Mr. Xu Beihong, painting should be very good, but it is rare and dare not talk nonsense; Calligraphy was a compulsory course at that time, and her calligraphy was very individual. Because she is a celebrity, all her things have high collection value.