Looking to buy a decent used Garmin with maps of all North America.. Mexico included as it's main use will be chasing Mako and the crew around from point A to B down in Baja

Not really interested in Tomtom or like brands for as with Garmin, they seem to have the most updated and reliable maps.. Kind of kayak related so if any of you have a decent navigation system you are looking to part ways with please PM me with info... Mods, i understand if this post has to go..
Thanks!
Tight Lines