Alexander Mackenzie ( 1923 - 2002 ) was a British painter. Alexander Mackenzie s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 5144.85 USD for PAINTING: ROCKS, GODREVY in 2003 to 30849.92 USD for PAINTING (GWITHIAN) AUG 57- in 2017 , based on the size and medium of the artwork.