I bought some MG12's from a seller in Florida (I'm in Louisiana) and he shipped them FedEx. He had modded them with external Xovers and also the Mye stands. It was quite a load when the FedEx guy started unloading all the boxes. IIRC, the Mye stands were in wood boxes and also the Xovers but the Maggies themselves were in probably the original cardboard boxes. Very compact and all in great shape.
But of course you never know. Definitely insure the shipment and as someone above said, Magnepan themselves ship their speakers.
Ever since I got mine, all I can think of is what must the 3.X versions sound like. Very addicting, the Maggies! But whenever I fine some at Audiogon, the seller is always a long way away. There's a guy in Phila. that has some 20's for sale. He doesn't really want to ship them and I really don't want to take the risk either. But renting a truck and driving up there is out of the question. Maybe it's time to move!
Gene
HTH,
Gene