I know that the Worx Xmas cashback has been mentioned a couple of times here (https://www.masters.com.au/pickedlist/worxcashback), but wanted to point out that you can use the deal posted here (https://www.ozbargain.com.au/node/175441) to get an additional $20 off.
That's savings of $30 to $70 depending on how much you spend.
Enjoy