Have been looking for some good robot vacuum deals - this is the cheapest I could find. Other users recommend waiting for a deal to come up as the international version drops beneath $600.
Shipping is 15-20 business days, so may be worth shelling out the $800+ for local stock from the official RoboRock store. Note: the deal linked only has a 30 Day refund/replacement.
$20 coupon for new users, not sure if you can stack with referral code.
$789.21 + Free shipping @ Catch https://www.catch.com.au/product/roborock-s5-max-robot-robot...
$849 @ RoboRock store - https://www.ozbargain.com.au/node/558093
$789 + $4 shipping @ RoboRock eBay store with PARTY21 Code (thank you ironpaw)
Thanks to Doowyah and Dezeption: Note that the S6 MaxV drops on the 28th, so may want to sit on it and see if the price drops down for local stock!