Today only, until 4:45 pm ET (or until 100% claimed), Amazon offers the Netgear DOCSIS 3.0 Cable Modem, model no. CM400-1AZNAS, for $46.99 with free shipping. That's the lowest total price we could find by $3. It features data transfer speeds of up to 340Mb/s and is certified for Comcast Xfinity, Time Warner Cable, Cox, and Charter, among others.