in my car i was doing the $77 per year rate for a couple of years. they want to set you up on autorenew with a credit card so that they can automatically bill you the $165 rate. i tell them to 'invoice me' when it is due. for the past couple of years, when it would come due, i would get them to transfer me to retention and just tell them that i didn't think it was worth the full $165, that i didn't listen much, and i was thinking of letting it lapse. they would then offer me 6 months at $24. one time, though, they would not offer me any deals so i told them to let it lapse. after a week, they were calling me on the phone begging me to come back for the $24 rate. even gave me a free portable unit that i gave to my kid so she could use it in her car.
the important thing is you've got to be able to stick to your guns and let it lapse if they call your bluff. they will hound you to the ends of the earth to get you to come back.