You can call Tivo and see if you can get lifetime for it at $99 or $199. Resale value increases with lifetime then without.
You can then get either a Roamio 4 tuner, any Premiere 2 tuner, or Series 3 models.
Series 2 (PLS, sold)
TiVo HD 1TB (157 HD Hrs, PLS, "652")
Roamio! Oh, wait, Its Juliet!
OTA! OTA! OTA!
The TiVo Apocalypse begins on Sat 2013 Feb 16 00:00 GMT!