Amazon offers the Zoom DOCSIS 3.0 Cable Modem, model no. 5341-00-00J, for $69.97 with free shipping. (Walmart charges the same price.) That's the lowest total price we could find by $8. t works with all US cable modem services and supports IPv6 and IPv4. It features download speeds of up to 343Mb/s and upload speeds of up to 143Mb/s.