Apple Watch Series 3 - 42mm Space Grey Aluminium Case (GPS Only) $349 @ Big W ($331.55 OW Pricebeat)
Normally $369 for the 42mm.
Can confirm Officeworks Pricebeat as I picked one up last night in Newcastle without fuss. Receipt/proof to come.
Also available in the 38mm (white/silver only) at BigW for $299. Officeworks Pricebeat reduces that to around $284.05. Officeworks have now reduced their price to $299, thanks jesse085
Some may complain about the Series 3 being old/slow etc, but it's about half the price of the Series 4/5.