OlgaV, it was not difficult to calculate: each work must have a fair price. If, however, for the work of poor quality is called an excessive price, it is natural to assume that it will not sell. Browse through catalogs and separating the wheat from the chaff, we obtain the result. See how easy?
Apparently the people who work with socialist realism, it is difficult to do, because basically have to deal with the works of low quality, hence the argument went.