Pieter Coopse ( 1640 - 1677 ) was a Dutch painter. Pieter Coopse s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 550.14 USD for ESTUARY SCENE WITH FISHING VESSELS AND A ROWING BOAT in 2005 to 9460.74 USD for Ships on a choppy sea in 2006 , based on the size and medium of the artwork.