I am planning for a trip to Cancun and before I go, I want to learn the cheap places to eat in Cancun. Not Mcdonalds or Burger King but something authentic but really cheap like where the local Mexicans eat. How much are the locals paying for a decent cheap food and where are they, that is what I want to know. And I have seen some posts by people living in Cancun and they are shopping in Walmart and other places. I was wondering why they do not shop at the street bazaars like the ones we see in travel channel. Is Walmart cheaper than the street vendors? Or you guys do not go there because you do not trust the quality. I assumed it should be really cheap since most of the customers are locals. Please post your ideas, experiences.