I am looking at buying a used Garmin Zumo 660 with a Touratech anti vibration mount for $550 from a guy and he doesn't seem to know much about this unit. Says it came on a GS800 that he bought used and has had some final drive issues and needs to sell the unit to pay for repairs. I asked him about if the GPS has been registered before and if it has lifetime map updates or anything. He had no clue about either. Should this worry me? He claims the GPS is in perfect running order with no issues but doesn't know if it's been registered before. So if it has been registered before how do I go about registering it under my name? And how do I find out if it has the lifetime map updates? And would they be transferable to me if it does?