this is never an easy question to answer since, for any given neighborhood of the zona sul, the prices for apartments can vary significantly in function of several factors.   

in fact, while these areas only represent a small percentage of the city, the local price variations can be significant within just a few blocks radius - accurate market values are also very difficult to assess.

there are many elements that determine the true value of an apartment and, despite the best research one can do, the safest option to pay the right price is hiring both a professional real estate consultant and a real estate or business attorney.