Advertisements I really want to retire one of my SD series one Tivos. I'm still on an old 15 year old tv and composite video at home. So I went to my local ding and dent store and they had a Series 3 tivo HD with the 180 hour SD/20 hour HD sized hard drive in it. They were asking 134 for the thing but I want to know if that is a good deal or no. It is used, not new. Also, are they upgradable like my old tivos are?