Wes Wilson ( 1937 - ) is an American painter. Wes Wilson s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 100 USD for Psychedelic rock concert poster promoting The Chambers Brothers in 2005 to 1000 USD for 3TH FLOOR ELEVATORS / GREAT SOCIETY in 2014 , based on the size and medium of the artwork.