That's because you don't seem to get the point that foreign vendors aren't responsible for your internal mess or government polices. You keep insisting that somehow the outside vendor is supposed to figure out what your government is doing inside its borders. You are also insisting that they put labels all over their website telling you what your government will charge you, the buyer/importer, and look into their crystal ball to give a quote for that part. I buy from all over the US and Europe, and no one from my vendors does for me what you seem to be insisting they do for you. This point was made several times by others here, but you seem not to accept it and want it your way. Get over it.
Amazon México: the good, the bad and the ugly
Living in Mexico but not a confident Spanish speaker? Don't let that stop you from ordering online from Amazon México. Read on for some tips.
Reading online suggests that there are many countries that do not allow the free transfer of goods from other places to private buyers in their country.