It's pretty close to the bone people. Christmas is sooner than you think and if getting a PS4 for someone's Christmas was part of your plans, this seems like good timing.
Or you could totally just buy one for yourself. That's also a halfway decent idea.
Worthy of note: this deal kicks off this Thursday, and it's in-store only. No sweet free delivery and whatnot here, but that may be superceded by the ability to walk into your nearest Big W and walk out with a super cheap PS4.
For more information head to Ozbargain.