english deutsch
Southern Highlands Stamps
http://members.optusnet.com.au/ausstamps/
Offers early and BOB (back-of-the-book) issues.
The National Stamp Gallery
http://www.rap.com.au/
Sells various issues and covers.
Tom Osborne
http://www.stampdealeroz.com/
Specializes in regular issues and issues of country's dependencies.