buying a car

I am planning to buy a car in the near future. Either a new car from a dealer or a used car from a private party. I will pay for it with dollars that are in my bank account in the US. Is there a way for me to maximize the purchasing power of my dollars by getting the 5:1 or 6:1 exchange rate...

I am moving to Buenos Aires with my pregnant wife and kids. I plan to try to live there permanently and I read you don't need a car, but I need to get my kids around as one of them is a special needs child and has a special chair. I noticed that car prices on some websites are quoted in...