The ARRIS SURFboard SB8200 DOCSIS 3.1 32×8 Cable Modem is only $ 124 with $ 20 coupon (clip on page). Although Amazon will probably remove the coupon at some point. Still $ 144 is a nice deal.
Edit – for those wondering this is NOT an Intel Puma chipset modem according to this site. It is safe to buy.
And it looks like there a few other networking products on sale as a Deal of the Day event.