You can get the Sony a7c (same sensor as the Sony A7III) for ~$1.7k at JB after applying the coupon code.
You can take this a step further with a power move: Request a price match at Sony, pay with amex, use cashrewards 9.8% cashback. This brings the total price down to $1,447.77. Screenshot of price matched purchase
Combine this with GST refund at the airport to bring the price down to $1,293.30. I managed to claim the price match successfully and made the purchase. However, YMMV.
Further, I paired this with the Sony 16-35mm Full Frame F4 G lens via a separate transaction after price matching it with camera warehouse to bring the lens down to $1,447.71. After cashrewards and amex, the lens costs $1,218.73. If claiming GST, it brings it down to $1,087.12.
Total cost comes to $2.38k for me.
Man you and the other guy just now need to go back to primary school to find your math teacher and apologise to them