Eat cheap in Buenos Aires
It is hard sometimes to post articles about prices in Buenos Aires, because they change so fast (or I type so slow) that they are not easy to follow.
The Wall Street Journal has published and article about restaurants in Buenos Aires that you may want to read.
I do not agree with the recommendations and I would choose different places to have my meals, but the comments on the prices are right. It is very cheap to eat in Buenos Aires. The prices listed in the article are for dinner. If you are having lunch, you will eat for 6 or 7 dollars in the best places of the city.