Not sure where in Greece
you are, but we found Blue's Yachting in Bodrum Turkey
were happy to import
a foldable scooter for us for almost the same price
as in US.
Regarding eBay and Amazon: some sellers on these sites are setup for export. Others are not. So it's not a matter of setting up cc, but rather of choosing a seller who can ship.
Also, some products are made for and sold in specific countries, though not the case here. For example, no matter how hard I tried, I was not able to ship a Columbia
baby snowsuit to SA because there is already a Columbia
importer in SA. But they would not import
it for us because it takes a year...