DON’T BUY THEM!
If it’s already shvi’is (pretty likely since locally they are not being used) then it is almost definitely sfichin and is ASSUR BAHANA’A! No hechser (not even rabbanut) will certify these because shmitta produce is not allowed to leave Eretz Yisroel.
If it’s still shishis then you cannot assume that Terumos and Ma’asros were taken properly even if the company is normally certified because the exported produce is NOT SUPERVISED! The rabbanut policy is that they do not impose any rules on produce that is for export.