Up for sale is a used Garmin Nuvi 3790. It is in excellent used physical condition. It works great but the charge port is kind of loose. I 3D printed a case that holds the USB cord in properly and will include that with the GPS unit. I am not sure if a better cord would work better. Other than that it is great. I just tried to update the maps and it said the maps are too large for the internal memory but it was going to update them. So, thr lifetime maps updates are still good, it just needs a Micto SD card for storage and you are all set.
eBay