GUWonder-- Im assuming you know this, but trading hard currency that is not the US Dollar when you are in EZE will mean increased transaction costs... and these may get even larger than usual if the changer you go to catches onto the BOS issued notes. Even Euros, while they are readily accepted here get a lesser exchange rate than do US Dollars... the more exotic your currency is, the larger the spread that is applied.

When you are in EZE... the US Dollar is still the undisputed king...