A few years back on the estate where I work a post man was jailed for having the equivalent of 12 mail bags of stolen parcel boxes in his loft. You never know who is handling your parcels. Buyer beware and uninsured parcels are a headache waiting to happen. If you use Paypal they virtually always come down on the side of the buyer if an item fails to turn up. Proof of postage is no proof of safe delivery. Insurance for valuable items is a must. I know its a wrong and a pain but honestly I'd always over insure.