linksys-official-store at ebay.com has Linksys CM3024 DOCSIS 3.0 Cable Modem 24X8 (Certified Refurbished) for $36.99 + Free Shipping
http://www.ebay.com/itm/302390535466
This seller also has Linksys CM3016 DOCSIS 3.0 16×4 Cable Modem (Certified Refurbished)? for 22.99 + Free Shipping?
http://www.ebay.com/itm/302336101355