Hello, as what ived known its only free, especially if the Mayor will be the one to conduct the ceremony, all you have to pay is the papers..and i think its only hundreds,,,but maybe if you get a judge to conduct the ceremony, you will pay the judge, but that is very expensive, it's almost the same as here in Uk, we paid 210pounds, 150pounds of that amount is ''rent of civil register''(where the ceremony will be held)....