Walmart offers the refurbished Arris Surfboard DOCSIS 3.0 Cable Modem, model no. SB6121, for $24.99. Choose in-store pickup to dodge the $4.97 shipping fee. That's $5 under our mention of a refurb from February and the lowest price we've seen for this device in any condition. (It's $38 less than a new unit.) It features support for IPv4 and IPv6 and enhanced network management. Deal ends today.

A 90-day warranty applies, but it's unclear who backs it.