If DHL wants some additional money from you, than you most likely ordered during the pre-order period. The pre-oder price did not include any taxes or import fees. DHL pays for you customes and VAT but obviously wants it back upon delivery. How much money you have to pay depends on your country and your batch. For example a first batch customer from Germany had to pay 74,85€ (~$88).
DHL ask for taxes and import fees, but also for customs clearance. The import cost can be reduced in some countries by doing the customs clearance yourself, and not paying DHL fees.