Newegg offers the TP-Link DOCSIS 3.0 Cable Modem, model no. TC-7610-E, for $39.99 with free shipping. (Amazon charges the same.) That's the lowest total price we could find by $14. It's compatible with Comcast, Time Warner Cable, Cox, Charter, Cablevision, and Bright House Networks, and features a Gigabit port and 8x4 channel bonding.