Billy Nolan Tjapangati ( 1945 - ) is an Australian painter. Billy Nolan Tjapangati s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 2156.33 USD for Pirmanga 1998 in 2004 to 11760.17 USD for Untitled (Men's Business) in 2012 , based on the size and medium of the artwork.