Best country to buy a 4x4 truck in South America?

Mr. Wildworld

New Overlander
Sep 15, 2019
Hello the title say ,I'd like to buy a 4x4 in South America.wondering in which country is best for a foreign?And of course
will need to cross borders and start a RTW trip with a camper on it..from the few info I could find on line looks like Chile should be fine(?)
and also a good place to start as I saw most of the other countries already..on a RTW motorcycle tour..
Any imputs highly appreciated.Thanks in advance