Sony WF-1000XM3 True Wireless NC Earphones $346 Delivered @ Catch AU
(Make sure you select Catch as the seller under more buying options under the 'add to cart' section. For some reason, I can't find a direct link)
Found these finally on Catch. Been waiting to use my discounted gift cards on the Coles deal. Saw that these were finally sold by Catch themselves rather than from a marketplace seller. Comes out to $296 if combined with five 50 dollar vouchers, and even cheaper if you have the student coupon code.
Don't forget Shopback/Cashrewards.