Best Buy B&M has the Asus RT-AC1900P router marked down to $75.99 as part of their networking discounts for back to school. That's $104 under the online price. The discount did not come up in the system at checkout, but after they verified the price on the shelf the cashier corrected the price. Expect these to go fast because the BB employees were already talking about picking some up themselves.
Purchased mine in Atlanta, GA.