Box it up, place the black and white UN label, take it to a UPS hub, not a UPS store. It can not go through the US Postal service. There are no extra costs involved, unless you want the aforementioned insurance.
_________________________
Never initiate force against another. But should someone do violence to you, retaliate without hesitation, without reservation, without quarter, until you are sure that he will never wish to harm - or never be capable of harming - you or yours again.