Kogan 2.45kW Reverse Cycle Split System Inverter Air Conditioner $499.40, less 20% with eBay coupon. Part of the eBay 20% off tech deal
RRP is $599 on the Kogan website, but it's always been $499 when I've seen it ($496 now)
I can't speak for the quality, but the price is decent.
Pretty sure thats the last one.