If you know someone arriving at the Sydney International Airport then get them to pick you up two 1 litre bottles of Jameson Irish Whisky for a total of $68. In comparison, one 1 litre bottle of Jameson from Liquorland costs $70.
Australian customs permit 2.25 litres of alcohol for each traveller.
If you like Jameson, try rather Jameson Caskmates (2x 1 litres) @$65, even better. Always available at Melbourne Airport.