Dear Constantine or Alexander (admin) if the opportunity to ask the distinguished expert Anatoly Borovkov,
http://artinvestment.ru/news/auctnew..._borovkov.html
(member of the International Confederation of antique and art dealers, an expert on books and printed graphics Russian avant-garde.) to review the sales of works E.Lisitskogo.Prognoz on the investment component of these works, in general, everything that is connected with the art market for this information hudozhniku.Eta many on the forum is interesting, especially with comments such as professional Anatoly Borovkov.
Best regards.