Linksys offers its refurbished Linksys AC1750 Max-Stream 802.11ac Dual-Band Wireless MU-MIMO Smart Gigabit Router for $39.99 with free shipping. That's tied with our June refurb mention as the lowest price we've seen for this router in any condition. (It's also $70 under what you'd pay for a new one today.) It features a dual-core processor, wireless data rates up to 1.7Gb/s, four Gigabit Ethernet ports, Gigabit WAN port, three external antennas, and USB 3.0.

Note: A 90-day Linksys warranty applies.