Linksys offers the refurbished Linksys AC2600 Max Stream 802.11ac Dual-Band Wireless MU-MIMO Router for $54.99 with free shipping. That's $5 less than our July mention for a refurbished model and the best price we've seen (it's $107 under the price of a new one today). It features a 1.4GHz dual-core processor, wireless data rates of up to 2.6Gb/s, four external antennae, four Gigabit Ethernet ports, Gigabit WAN port, and USB 3.0.

Note: A 90-day Linksys warranty applies.