Originally Posted by
M60_to_LGA
You'll get 1400 or close to it if you exchange USD cash (new $100 bills) at most places. That's what I did last month. Your accommodation should be able to recommend a trustworthy place to change money. When I was in BA last month, the newsstand directly in front of my hotel did the trick quite nicely.
I got 1260 with a not-new $20 bill (I want to have some pesos to add to my collection) from the shop that the Park Hyatt recommended and felt pretty proud of myself.