Best of all, the AGNSW is free for permanent exhibitions. Every year the AGNSW has a coompetition for portraiture called the Archibald prize
Are art museums free where you are? For me, the greatest free museums in the world are the British Museum and the National Gallery in London. The Metropolitan in New York suggests a donation, but it is not compulsory.
I'm one of those people who believe that culture, education and knowledge should be free for all - paid for by a progressive tax system - public libraries, art museums, museums.
[And apropos of none of that - today is the last day of summer; our seasons here change officially on 1 March, 1 June, 1 Sep and 1 Dec. And in Sydney, autumn is my favourite].