TP-LINK TC-7610 DOCSIS 3.0 Cable Modem for $39.99 shipped. Here is a screenshot for reference. It supports up to 343Mbps downstream and 143Mbps upstream data rates. 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 it for about $59.