Walmart offers the factory-refurbished Motorola Surfboard DOCSIS 3.0 Cable Modem, model no. SB6121, for $44.78 with free shipping. That's tied with our mention of a refurb from two weeks ago as the lowest total price we've seen. (It's also $24 under the best price we could find for a new unit.) It features support for IPv4 and IPv6 and enhanced network management. A 1-year Motorola warranty applies.
Newegg offers the D-Link Tri-Band 802.11ac Wireless Gigabit Ethernet Router (pictured), model no. DIR-890L/R, bundled with the Motorola SURFboard 600 Series DOCSIS 3.0 Broadband Cable Modem, model no. SB6183, for $329.99 with free shipping. That's $100 under the lowest total price we could find for these items sold separately elsewhere. The router This tri-band (2.4GHz and two 5GHz) wireless router features five Gigabit Ethernet ports, 1GHz dual-core processor, USB 2.0 and USB 3.0 ports, and six antennas. The modem features download speeds of more than 600Mbps and upload speeds of more than 100Mbps. Note that this modem may not be compatible with all service providers.