I have two Series 2 single tuners Tivos with Evaluation lifetime service for $60 each plus shipping. Of course, it must be understood that a 'Evaluation' for the 'service type' means that U don't have to pay a monthly fee, but Tivo could suspend the 'Evaluation' status and make U to start to pay at anytime. Some people have had Tivos for years without paying and others have had Tivo switch the status to open but needing payment.
I talked to Tivo and they said that I could add them to my account and use them without charge, but they wouldn't change the 'evaluation' to 'lifetime'.
I also have many full lifetime Tivos available too. None are HD.