FedEx and UPS handle such things all the time, and WCI ships prints and originals by the same means. When my parents were in the jewelery business, they shipped and received all sorts of costly items by UPS. I'd recommend not sending them all in the same batch (you wouldn't want to lose a whole show!), and you might look into having them insured separately (i.e., not by the shipper) for loss or damage in transit.