Because actually it's not the dollar. It's actually the peso in Buenos Aires. Very clever Buenos Aires street vendors decided to practice price discrimination to the detriment of any passing gringo tourists.
Službena valuta nije dolar, nego peso u Buenos Airesu. Vrlo domišljati ulični prodavači u Buenos Airesu odlučili su primjeniti cjenovnu diskriminaciju na štetu svakog gringo turista u prolazu.