An in dash unit can cost close to $2000 and a good, large screen, portable unit can be bought for a few hundred. Keep in mind that "LIFETIME" maps are not really what you think. This is what Magellen has to say and as I found out from Garmin GPS, they have similar limitations as to how long you can continue to get updates for your GPS.
For all lifetime map subscriptions, lifetime refers to the useful lifetime of the device, considered to be 3 (three) years from the date of the first use. For all lifetime map subscriptions, you will receive map data updates when such updates are made available on Magellan’s website during the device’s useful life for that compatible Magellan device. “Device’s useful life” refers to the period during which the device has all required technical capabilities, including sufficient memory capacity and current operating system, to download and use current map data. A device’s useful life is considered to be a maximum of 3 (three) years from the date of the first use. A device will be considered past its useful life if it is more than 3 years old or if no updates have been downloaded for more than 2 years (24 months).
