PSA for Aussies, don't buy autopilot upgrades until your car is delivered. You will save about $1,400

the 33% luxury car tax + stamp duty is applied if you buy Autopilot with the car. It isn't if you upgrade afterwards. This makes it cheaper to wait until you have your car, even considering the higher cost:

Price added for Enhanced Autopilot + full Self driving for VIC using Tesla website: $16,411

Cost for enhanced autopilot + self-driving added after delivery: $15,000