I'm in NSW and the postage in the listing is showing at $12.75. When I click the postage tab and put in the postcode of 7000, the postage changes to $25.Perth comes up as $22. Brisbane is $13.50. Adelaide is $14. Darwin is $25.

The postage is calculated on size and weight. The further you are from the seller, the more it's going to cost to post, that's why those of us in NSW are seeing a much lower cost than you.