The sale of raw cow's milk for human consumption is unlawful In Australia.
Consumption of raw (unpasteurised) milk can cause serious illness.
Pasteurisation of milk is undertaken to kill harmful bacteria that causes this illness. It is important to recognise that, no matter how carefully it has been produced or handled, raw milk can still be harmful.
Further information is available on this topic:
Dairy Food Safety Victoria: http://www.dairysafe.vic.gov.au/science-knowledge/from-the-chief-scientist