Nikolai Efimovich Rachkov ( 1825 - 1895 ) was a Russian painter. Nikolai Efimovich Rachkov s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 2082.49 USD for Portrait of an elderly Russian gentleman in 2008 to 121000 USD for PORTRAIT OF A GIRL in 2008 , based on the size and medium of the artwork.