K.Chebotarev help to know the approximate cost
 

Greetings to all . Please help determine the estimated cost of work. Konstantin Chebotarev (1892-1978) , gouache on paper 50x70 , signed lower left , on the back of the signature and the name of "Window and galaksinii " 1940 good condition . Was purchased by me in the late 80 's in the State Fund for the commission Kashirke in Moscow.