Thanks for your help. Garmin support contacted me and said that if I sold the unit with BlueChart America with its unlock code, then I could deregister the unit with them and the new owner could register it and use the unlock code. They were very prompt and helpful.
--- In Garmin_GPSmap_76C@yahoogroups.com, "Paul Scribner" <morgan323@...> wrote:
> I'd like to upgrade from my Garmin 76CS with MapSource CD version 6.16.3
> to a Garmin 440 series. My question is can I offer my present unit for sale on E-bay and allow the buyer to register both the unit and MapSource for their use? Or will Garmin somehow prevent that? Both the unit and MapSource are in good condition and presently registered in my name.