Walmart offers the refurbished Arris Surfboard DOCSIS 3.0 Modem / AC Router, model no. SBG6782AC, for $78.13 with free shipping. That's $2 under our expired refurb mention from two days ago and the lowest total price we could find for a refurb now by $27. The modem supports IPv4 and IPv6 and features enhanced network management.

No warranty information is provided.

Update: The price has dropped to $76.13.