I am finding that you can purchase the Garmin Nuvi 2555LMT at a current low price of 199.00 from several stores. This is a great deal on a very nice device.
Is it possible to use an SD card from an older Nuvi, which contains a large collection of POIs accumulated over the years?
Put it in and see if it works. Can't hurt the GPS and will not work if it requires the later/faster SD cards.
If it wont work, just get a higher speed card and copy all the info over to the new card..
Have had 3 Garmin GPS units and have been in the sun on windscreen and have never failed, and that is in temps well above 40+ degrees.
45 in the shade at the moment.....