I still have my old cable modem (which is not old...about 1 year) that I had when I lived in RI and had cox cable.
I would be will to part with it for a few sweet plugs . It works great and looks brand new. cable modem + dc power supply and I will toss in a custom sandman ethernet cable I made;) I now have adelphia and their package included a cable modem so now I have two.

This might be a cheap way to own a cable modem. I will eventually put it up on ebay if there is no interest here.