Binglee eBay Store has the Dyson Pure hot cool purifier reduced to $649 use the PLATYPUS code to further reduce it to $584 on checkout - remember free delivery for eBay Plus members too
Edit: TGG also reduced their price here using P20GOOD @ $519.20 https://m.ebay.com.au/itm/NEW-Dyson-308008-01-Pure-HotCool-L...
Though postage highly inflated at $35 (still saving of $30 overall though). Free Click and Collect.
Mod: Updated main link to cheaper price from TGG.