Below is a list of astronomy related links.
For shops, the closest captial city to the business is displayed in brackets.

Australian Astronomy shops that display prices on the web:

Andrews Communications Systems (Sydney)
Astronomy Electronics Centre (Adelaide)
Aquila Optical & Electronics (Sydney)
Astronomy Online (Sydney)
Advanced Telescope Supplies (Sydney)
BinTel (Melbourne & Sydney)
My Astro Shop (Sydney)
Shell-Lap Supplies (Adelaide)
Sirius Optics (Brisbane)
Space and Astronomy (Brisbane)
Star Optics (Brisbane)
Telescopes and Astronomy (Adelaide)
Telescope Shed (Melbourne)
York Optical (Melbourne, Sydney & Brisbane)

Australian Astronomy shops that don't display prices on the web:

Astronomy Alive (Melbourne)
Adelaide Optical Centre (Adelaide)
Astro Optical (Melbourne & Sydney)
Binocular Telescope & Optical World (Perth)
Frontier Optics (Sydney)

Manufacturers and Resellers of Astro Equipment:

Bushmaster
Celestron
Guan-Sheng Optical
Meade
Orion
Saxon
Skywatcher
Takahashi (Japan)
Takahashi (America)
Tasco
TEC
TMB
Unitron
Vixen
William Optics