D-Link DCM-301 DOCSIS 3.0 Cable Modem for $32.79 shipped after clipping a $10 off coupon. Here is a screenshot for your reference. It is compatible with Compatible with Comcast Xfinity, Time Warner Cable, Charter, Cox, Cablevision, and more. Having your own cable modem often means you do not have to rent one from your internet service provider (ISP) with a monthly rental fee, which saves money in the long run and this is also a better cable modem than most modems from ISPs. Most places have this cable modem for about $58.