Overland bus anywhere in south america
 

Hi guys, I was in Ushuaia a few years ago and spotted a few overland buses for sale but didn't really take to much notice. Now I've got a few guys that want to do a South America trip and there's probably about 8-10 of us so we are looking for some sort of converted school bus or similar. I'm mostly seeing 4x4 behicles here with a capacity of about 4 people. Would anyone know a place to find these old buses that have most likely been drove down from USA ? Thanks for your help

Dave