Newegg offers the ZyXEL Comcast-Compatible DOCSIS 3.0 Cable Modem, model no. BRG35503, for $49.99. This $30 mail-in rebate cuts it to $19.99. With free shipping, that's tied with our Black Friday mention as the best price we've seen. (It's a current low by $40.) This modem features channel bonding of up to four downstream and four upstream channels and IPv4 and IPv6 support. Rebate expires December 24.