Not the cheapest ever, but still a decent deal as all other options are between $1459 to $1600. Additional 10% discount from Mobileciti which can be stacked with the Afterpay Day coupon to get the final price at $1285.49.
Credit to posts from Clear (https://www.ozbargain.com.au/node/719684) & Mobileciti (https://www.ozbargain.com.au/node/719833)
Hopefully get a similar deal for the auto clean wash fill dock.
Edit:
Created a new Ebay account for the transaction and Shopback tracked $153.22 (not sure how it calculated this amount as I assumed it was supposed to be just 2% for electronics, but guessing its considered as appliances and hence 10%). So effectively got it for $1132.27.
Bought a roborock S5 about 3 years ago for ~$500 and a S6 MaxV for about $1k some time later. The additional cost is definitely not worth it for these 'flagship' features.