Just a thought, those 'If it fits, it ships', Priority Mail flat-rate boxes (medium size) cost @$10-11 with insurance to ship anywhere in the US and should be large enough to hold as many cables as you'd want to send and enough packing material to keep them safe from even the most careless postal worker. I'm not sure if the box can be reused but the boxes are free and readily available at most post offices. You can even order them from the PO and have them delivered to your door. By contrast, a box weighing 10lb cost $15 via FedEx to ship from Baltimore to Raleigh. Might be worth a look...