Luuki_Luuki via Amazon offers the refurbished Netgear N600 Dual-Band 802.11n Wireless Gigabit Cable Modem and Router, model no. C3700-100NAR, for $39.99 with free shipping. That's $6 under our September refurb mention, the lowest total price we've seen, and $17 under a new one today. This 2-in-1 dual-band (2.4GHz and 5GHz) wireless router features a DOCSIS 3.0 modem with speeds of up to 340Mb/s, two gigabit Ethernet ports, USB, and WPA and WPA2 encryption.
At least a 90-day warranty applies, but it's unclear who covers it.