Your total payment will be the sum between the offer you made and the required surcharges that are not paid directly to the supplier. When it is necessary to pay surcharges to the supplier, they will be specified in the auction. Otherwise, the mandatory supplement will be added to the amount of the offer.
Check the Conditions of the auction where you can see this in a clear and detailed, you can find the following supplements:
Operating costs of Ubeo, this is a quantity that ranges between € 3 and € 14. This is a quantity proportional to the cost of the product.
This also may have other mandatory supplements, such as shipping costs.
On the other hand, in the Conditions there may be requested surcharges which will be paid directly to the supplier, as if it were the Tourist Tax for Hotels.
It is not so? There may have been an error and when this happens, there has been a fault and do not hesitate to contact us.