Newegg offers the Zyxel DOCSIS 3.0 Cable Modem, model no. CDA30360, for $78.99. Coupon code "EMCETGM35" cuts that to $49.99. With free shipping, that's the lowest total price we could find by $10. It features data transfer speeds of up to 400Mb/s and is certified for Time Warner Cable and Cox Communications.