By pure chance, after writing the original post I went to the Amazon site to look at some books. And noted that they talk about stuff being
shipped. But presumably they don't necessarily send it by boat - ???
Yes, I agree with Clive that
consignment/consigned is an alternative. But
shipped/shipment seems more usual - in fact I've just done a
googlebattle and it's come out :
shipment - 47.7 million;
consignment 9.2 million. No contest!