When you make that decision to purchase real estate in Mexico, you may choose from a few options. Two of those options are a readymade home/condo or one that is or will be under construction soon. There are advantages and disadvantages to purchasing a Resale or Presale. The following will give some fundamental differences to each. A lot of It depends on what you are looking for, the purpose of the property, and time frames on how soon you want to take possession.