Any tivo you buy , new or used, will require the same service commitment as one purchased from tivo.com if you simply start a new subscription. What you can do is login to your tivo.com account (don't have one? set one up) and do a transfer service number. Your old Tivo will be de-avtivated and your new tivo will be activated in it's place. You'll get the same rate you've been paying w/o having to commit to 3 years of service. This is not an option if you buy new and expect a rebate. Units need new subs with service commitments to qualify for a rebate.