I always insure my packages that I ship. Even if it is just 50 bucks. That way if it gets lost i dont have to refund the money out of my own pocket, and I am not out a 50 dollar item that I had sold. I woulnt expect the buyer to eat the money for a lossed item and pass the buck saying that the shipper was fault, not my problem. I dont want to eat the loss as the seller, so I guess that leaves insurance as the only option.
Plus Deliver Conformation on US Priority Mail is 45 cents. Well worth the money so I know when some thing has been deliverd, instead of some body trying to scam me.