Here is something that might help
I've always had first class service from Garmin- very helpful
(granted- the wait is quite long on the phone but when you do get through- very quick to help with real solutions.)
As far as repair of units- here is their reply when I enquired about my 276C
Thank you for contacting Garmin Europe Support.
The non warranty repair cost for the 276c is approx £130.56.
GARMIN'S OUT-OF-WARRENTY REPAIR POLICY -EXPLAINED
FLAT RATE CHARGES
For out-of-warranty repair, GARMIN used to charge parts and labor. This became a resource intensive task of estimating the repair, and trying to contact the customer with the estimate, and so on. Many customers wanted an estimate before they sent the unit in for repair to determine if the unit was worth fixing or not. Obviously you can't do this until you see the unit.
About two years ago, we switched from the parts and labor method of calculating repair charges to a flat rate overhaul system.
With this system, there is a single flat rate charge for complete factory overhaul of a specific product returned to the factory for service. The customer knows up front what the charge will be, so there are no surprises. The factory overhaul process is a thorough process which brings the unit up to the same specifications as when it was new. Any cosmetic issue are addressed, like scratched lenses, cracked cases broken antennas, worn out NiCad battery packs, etc.. If possible, the software in the unit is updated to the latest version applicable to the product. Any modifications or updates are installed in the product as appropriate. Our goal is to send a product back to the customer in a new condition, regardless of the condition it was in when it was received.
If you have any further queries please don't hesitate to contact us again.
Regards,
Senior Product Support associate
Garmin (Europe) Ltd
http://www.garmin.com
http://www.garmin.com/support/
Useful Numbers;
Sales Support 0870 8501242
Returned Units 0870 8501245