Amazon launched in Brazil in Dec 2012, by opening a Kindle store. Then in August 2014 they also started selling print books. Brazil is the largest market in Latin-America. MercadoLibre is the market leader in Brazil.
In April 2017 marketplace was opened for third-party sellers. But it still only allows books to be sold. In October 2017 marketplace added Electronics category.
Looking for the list of Amazon.com.br marketplace sellers? It has moved to SellerRatings.com.