With the highest Australian marbling score of 9+, the award-winning Wagyu steak is available for purchase at Costco Marsden Park if you ask the butchers. Should be available at other Costco warehouses too. I also find Costco meat cuts (and seafood) are usually far better than Coles/Woolies.
$149.99/kg is a really good price for Master Kobe steak considering my local butchers in the Dee Why/Manly area sell these cuts for almost $200/kg.
I'd be far to scared to cook it myself, so would have to factor in a rent-a-chef as well…..