The price of Super Mario Party for the Switch has just been dropped to $67 on Amazon AU. It's now the cheapest offer for AU stock that I'm aware of.
Use Cashrewards for an additional 6% off. My experience with Amazon and Cashrewards is that the cashback only applies to the amount excluding GST, so:
67 - 67 * .9 * .06 = $63.38 effective final price.
EDIT: Thanks TA/Cashrewards, it's effectively $60.97 until midnight tonight 10% cashback via Cashrewards.
EDIT2: 12.5% cashback via Cashrewards or Shopback for 10 Oct only, effective price is $59.46.
It was $69 this morning when I checked. Looks like they price matched Catch which also has it for $67.