John Wonnacott ( 1940 - ) is a British painter. John Wonnacott s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 24086.71 USD for The Upturned Boat in 2007 to 27097.55 USD for Self-Portrait with Electric Light Bulb in 2007 , based on the size and medium of the artwork.