London-based Russian art specialists MacDougall???s recently sold Kustodiev???s Flee for $2,800. ???Posters are a market that will grow with the growing middle class, who are willing to spend a few thousand dollars on a poster,??? says the auction house???s co-owner William MacDougall. ???Russian art isn???t just dependent on oligarchs anymore.??? Viktor Govorkov, Farm work cannot wait!, 1954