Hi there, this deal was so good (edit: have been told it's not that great compared to online prices) I had to share after I picked up one myself.
I saw the cheap price on allphones.com.au and wondered if I could get someone to pricematch it. I went to JB HiFi (had a gift card) but the guy there said that it was too cheap -below their desired profit margin I imagine- so he refused to price match it.
So I went down to my local officeworks store and walked out paying $759.05 instead of $988. This is even better than the 20% off Good Guys deal which came to $790 I believe. (Edit- I may have just gotten lucky and they may not pricematch normally because its Optus branded.)
Hope this helps someone.
Sorry to say OP, $799 is not a good price for this phone. Take a look at the other S8 deals that have been posted