Our policy is lowest fees and max transparency. We offer a zero blockchain fee whenever possible, and if a fee is unavoidable, we specify it in order conditions. So, you see how much you are going to pay before taking any definitive actions.
Note that alternative payment systems can have their own fees; banks may charge a conversion fee, if your card is linked to an account in a currency we don’t yet support. For more details on third-party fees, contact respective service providers.