When purchasing items from international sellers you might find yourself in a situation where additional charges will be applied in accordance to your local rules and regulations.
If, for example, the seller is located in the US and you are based in EU, depending on the local regulations, order value etc., customs, duties and taxes might be applied on top of the order and shipping price.
Please be aware that these are not calculated and included in the final price shown in the international checkout (as stipulated in our Terms of Service, points 7.a and 7.c) and you will be notified by the relevant authorities if any additional charges have been applied.
Bear in mind that these charges are applied by the state and are non-refundable if you choose to return the purchased item.
For more details please refer to your government's official documentation on the subject.