I have two HD Series 3 Tivos now with lifetime. We have a 3rd TV off the kitchen that my youngest child likes watching. It is an HD TV, hooked up to an antenna and does have a Roku box for Netflix and such. Anyway, my son loves the Tivos we have on our other TVs and would like one on that TV. I really don't want to invest another several hundred in an HD Tivo, and a woman on our local moms' group is selling a Series 2 with lifetime. Is this even worth it? Would it work for the TV (I know I won't get HD through it, but will it even work???) It would be hooked up to an antenna, we do not have cable. Would it need a converter box too? IF it works, how much is a reasonable price for it?