In order to comply with international laws, we cannot mark shipments as 'gifts' or 'samples' to bypass customs fees (besides, that rarely works anyway).
We do however mark down the cost of the items to minimize the customs value. Typically the declared value is around 25% of the invoice cost. Most countries have an allowance of at least USD25 before duty is charged, so the vast majority of orders are not subject to additional fees.
Whilst we cannot be responsible for any fees, we do our best to keep them low for you :-)