Just how much does it cost to upgrade a Garmin Nuvi?
This is the"safe" play in case you don't know how long you'll keep your present GPS. These upgrades run about $70 -- $120 depending on the seller and the sort of map purchased. Garmin typically charges about $70 for one upgrade, Magellan roughly $80, and TomTom costs roughly $80 -- $90 based on the map technologies.
