Seems like a decent price for the 3-pack.
I have the RBK50 - 3 pack and it has been great for the past three years. I want to upgrade to WiFi 6 myself but will wait for a better price.
Officeworks has it priced at 796$ currently. Could ask them for a price beat and save some extra $$.
I was looking at this or the Asus XT8 but the price wasn’t coming down. I landed on the TP Link XE75 AXE5400 for $614 delivered from TGG Commercial. Reviews have been good so far.