Newegg offers the refurbished Asus Dual Band 802.11ac Wireless 1750 Gigabit Router, model no. RT-AC66R, for $119.99. Coupon code "AFEX327A0034" drops it to $89.99. With free shipping, that's tied with our mention of a refurb from two weeks ago as the lowest total price we've seen for this model. (It's also $40 under the best deal we could find for a comparable new unit.) It features a maximum speed of 1.75Gbps, dual-band support, four Gigabit Ethernet ports, and two USB ports. Deal ends March 31.
Note: A 90-day warranty applies, but it's unclear who backs it.