newegg offers the Motorola SURFboard DOCSIS 3.0 Broadband Cable Modem in White, model no. SB6141, for $86.99. Apply coupon code "WALLET" and check out with Google Wallet to drop it to $71.99. With free shipping, that's the lowest total price we could find by $15, although we saw it for $6 less in a different color in May. It features upstream and downstream channels, support for IPv4 and IPv6, and enhanced network management. This modem may not be compatible with all service providers.

Of note, Zumbee Inc via Amazon has it in Black, in non-retail packaging, for $69 with free shipping.