OSKI You are probably right. My concern was the new credit card rate (a bit lower than Blue Rate from what i have read) would not be updated or would be changed to fall back to Official Rate. I will likely try some $500 - $700 (as suggested) amount to be a 2nd method of getting a decent US $ to Arg Peso rate. And taking some fresh $100 US bills with me also. kennycrudup info was helpful as well. Will try to remember to post data points late next week after arrival.