Why aren’t customs duties included in the shipping costs?
Each individual country and region has a local customs office. For all international shipments, this office has the ability to choose what, if any, they are going to charge for inspecting the contents of international orders. Some times they do not charge anything. Other times, though few and far between, they have charged fees in excess of $50. Ultimately it is the decision of your local customs office to determine not only to delay the delivery of your order, but also charge any additional fees they so choose before they release your order to you.