I'm seeing this in stock in Best Buy Canada for $259.99 CDN. https://www.bestbuy.ca/en-ca/product/asus-wireless-ac2900-dual-band-gigabit-router-rt-ac86u/11281277.aspx?
I just ordered an RT-AC1900R, thinking of cancelling/returning that in favour of this. But, not until Merlin officially...