All cards to be send are put per 3 into a penny sleeve and in between cardboard. If the total order is less than €5 ($6-7) they might be put into penny sleeves and top loaders per 4.
Due to weight limitations I can put only 9 cards in an enveloppe this way .

There is no tracking code in a normal shipment. The cheapest way for me to provide one is to make a singed sending and which adds an additional fee of € 5,13.