I want to give my input , i have lived in south america for 20 years + and prices seem very very high in ARG , BR , Uruguay IMO.
Most ridiculous cost i have seen in the last 12 month. Water bill for a house in Punta del este Uruguay january 2010 . us$1000 . The gardener actually said that was "cheap " ....Something is wrong here ! (argentines and brazilian buy in uruguay for tax purposes..)