Newegg offers the factory-refurbished Motorola Arris Surfboard DOCSIS 3.0 802.11n Wireless Cable Modem, model no. SBG6580, for $69.99 with free shipping. That's $40 under the lowest total price we could find for a new unit, although we saw a refurb for $5 less in January. It acts as an 802.11n access point, features four Ethernet ports, and supports IPv4 and IPv6 and enhanced network management. A 90-day Arris warranty applies.

Note: These modems may not be compatible with all service providers.