Bluedealz via eBay offers the factory-refurbished Motorola Arris Surfboard DOCSIS 3.0 Broadband Cable Modem, model no. SB6183, for $49.95 with free shipping. That's $30 under our January mention of a new unit and the best shipped price we've seen. (It's also $47 less than buying a new unit today.) It features download speeds of up to 686Mbps and upload speeds of up to 131Mbps. A 90-day Motorola warranty applies.

Note that this modem may not be compatible with all service providers.