eBay has Netgear Nighthawk CM1100 DOCSIS 3.1 Cable Modem on sale for $95.99 with free shipping.
Product Features:
- Works with Xfinity, Cox, and Spectrum.
- Meets DOCSIS 3.1 specs, and backward compatible with DOCSIS 3.0. 2
- Gigabit Ethernet ports.
- Support all cable internet.