Newegg offers the refurbished Asus Dual Band 802.11ac Wireless AC1200 Gigabit Ethernet Router, model no. RT-AC56U, for $54.99 with free shipping. That's $8 under our April mention of a refurb and the lowest total price we've seen. (It's also $45 under the best price we could find for a new one.) It features a maximum speed of 1.14GB/s, dual-band support, four Gigabit Ethernet ports, and USB 3.0 for sharing printers and hard drives. Deal ends August 3.
A 2-year warranty applies, but it is unclear who backs it.