The 48ers in Cyprus (an EU country) have posted that they will be charging a 15% TAX (not a tariff) on US purchases plus an approximate 6% FedEx clearance fee on FedEx international shipping (already their most expensive option). Cyprus postal system is not currently available for shipping to the US.
Meanwhile the UN’s Intenstional Postal Union reports that mail shipments to the US is down 81% since August 29