How much is Cai Chunde's painting a flat foot?

painters generally have grading titles, such as Grade 4, Grade 3, Grade 2, Grade 1, etc., and there are also works, such as Chinese painting, oil painting, calligraphy, etc. According to the actual situation of the painter, they should be first-class painters in provinces and cities, and the price is generally estimated at 3-8 a flat foot, depending on the quality, seal, cooperative painting and human feelings of the painting. advisory opinion