6800 is now back in stock at the WA Warehouse. If you're after this card, get in before they're gone.
If you're in a toss up between the 3070/3080/6800 I've attached some reviews I've found good to help you make your decision between time/performance/availability:
https://www.kotaku.com.au/2020/11/amd-radeon-rx-6800-review-…
https://www.techspot.com/review/2174-geforce-rtx-3070-vs-rad…
Did you booked one with them?