For Greece if (the custom authorities selects the packet as something worth checking) the cost would be (Price+Shipping cost)*1,23+20~100 (depends if you are willing to do the paper work etc your self) Euros. If Price+Cost<= 22 Euros there is no problem with custom services. For Greece UPS, DHL, DHL INTERNATIONAL, FEDEX will deliberately send every packet through custom services. The profit they make is bigger than the shipping profit it self.
Alexander.