Car/Van Wanted Southamerica/Uruguay

We are a couple in our roud the world trip, we backpacked beautiful Central Americ and are now looking for a van to continue our travel in South America, we are currently in Uruguay, may travel for the car  to Argentina or south of Brasil, our budget is around 4000 USD, we have uruguayan and european nationality (just so you know if teh transaction would be possible).

Does anyone just finish their trip and want to pass their car further?