Customs probably think we Norwegians try to buy suspicious Things from The Netherlands. Maybe Your prices are lower, but I am fortunately very ignorant of these Things. No, let us keep to stamps.
Mail from overseas, since december I received several from Canada & China. None from the USA.
@Erling unfortunately in the Netherlands we are very good in exporting certain 'chemical' and 'agricultural' products. I can't be suprised that there is an extra check by the customs.
I received a lot of letters open by Customs, but they are sealed after by sticky tape "Border control" or something like that.
Erling, Customs official don't know that we are "collectors" and collecting USED stamps