Today only, Buy.com offers the Motorola SURFboard DOCSIS 3.0 eXtreme Broadband Cable Modem, model no. SB6121, for $79.99 with free shipping. Plus, opt-in to receive 800 Rakuten Super Points with your purchase. (They convert to an $8 Buy.com credit.) Assuming you use the credit, that's the lowest total price we could find by $13. (We saw it with a $10 gift card for $6 more in August.) The SB6121 features upstream and downstream channels, support for IPv4 and IPv6, enhanced network management, and more. This modem may not be compatible with all service providers.

Note that the Super Points won't be added until 15 days after your item ships; after being added, they'll expire in 20 days.