I was browsing my local walmart and happened to stumble onto this gem for $40. As with all Walmart deals, take these with a grain of salt, fwiw, the store I found it at showed "limited stock" which normally means "no stock". Enjoy!
Brickseek link
Walmart.com link
Full item name: ARRIS SURFboard SBG6900-AC (16×4) Cable Modem WiFi Router Combo, DOCSIS 3.0 | AC1900 | Certified for XFINITY by Comcast, Spectrum, Time Warner, Cox & more | 686 Mbps Max Speed
Iconic One Theme | Powered by Wordpress