Until this day we never had a case where a customer from the United States, the European Union, Australia or New Zealand had to pay custom fees. Those countries offer free imports for packages that are are valued below a certain amount, in most cases several hundred USD. And even for bigger orders we never had a problem, because we split bigger orders in multiple packages.
However, we can't guarantee that these laws will stay this way forever, so if you want to be sure, please check your countries individual laws.