I can't tell about Mexico situation, but living in France, you can see offers for imported phones (often shipping directly from China or other countries, with large shipping delays) on all platforms like Amazon, Rakuten, Fnac etc. (apart from original ones from vendors/platform themselves).
Usually those imported versions are 10-20% cheaper.
I was always suspicious about those deals and wouldn't buy it myself, spending hundreds of bucks and not being sure if I'm getting the real deal, or some fake / limited version with worse networking etc. but given that they're up year after year, probably many people do buy it.