The Australian government website states with regard to the ETA:
There is no visa application charge for an ETA. However, a service charge of AUD20 applies for online applications only.
Yet, nowhere on any Australian government website could I find instructions on how one might make an offline application. (It's almost as if the Commonwealth wants me to pay them AU$20)
I am an American citizen (living in the US). How can I go about making an offline application, and avoid paying the AU$20?