...this is for germany. you'll have to switch it to greek, obviously
(in the top of the page) and use the same TARIC code. and enter the US
as source/destination country. This will tell you what import taxes
are due. add VAT and you're there.
I actually found out that it's 3.2% import-tax + 16% vat for
germany...which still is a lot but not prohibitively so.