Hey OzB, first post here so please be kind.
I've been looking for a new phone and this just happened. There could be cheaper prices through eBay shops but I assume they're most likely to be grey imports.
Also, there is JB Hi-Fi's $200 gift card if you port your number to an eligible Telstra plan (link here) so you could bring it down to $577 after price matching.
Happy to be corrected as I'm really considering this phone now.
Before anyone else restates what you've said about it being cheaper elsewhere, congrats on your first post! I think that's a pretty good price. If you buy from eBay, you can get AU stock with AU warranty from different sellers including Allphones (who always seem to be included in the frequent ebay coupons) but it's my understanding that their S8s are Optus branded(?). Either way, a price beat at Officeworks would bring this to $738.15. Also to consider would be a JB-HiFi price match with 5% off gift cards for RACQ members if that applies to you. Although I've never had any luck getting them to price match, even from local stores in stock. Last time the bloke said, "sorry we can't get close to that".