How much did Jackson Pollock 's piece " Blue Poles : Number 11 , 1952 " sell for at auction in 1973 ?
In 1973 , Blue Poles " ( Blue Poles : Number 11 , 1952 ) , " was purchased by the Australian Whitlam Government for the National Gallery of Australia for US $ 2 million ( A$1.3 million at the time of payment ) .