New to the game here and almost asked this in the "What is my S2 worth?" thread, but decided against derailing that thread and starting a new one. Referring to the US, non-Direct TV models, do all the prior series still work if you're willing to pay for it? Could you activate and use a Series 1 still and have it work within its limited space and feature set or has the cable industry tech changed in a way that the signal won't be interpreted correctly or whatever? Or, likewise, has TiVo dropped support for any old models? I'm thinking about picking up a backup with lifetime for a bedroom, but we'd basically never use it so I'd want it to be dirt cheap and not drive up my monthly bill.