Another consideration when purchasing insurance... Once you insure the package from the shipper, you have purchased an advertisement of its value to anyone with an evil intent. Some of the quilts I mail are for family and while valuable to me, cannot be proved. I just mail via USPS with delivery confirmation. If it is a special quilt and it has been appraised, I have it insured with a rider on my homeowners policy. It is very inexpensive. Then I ship it without insurance from the shipper, usually FedEx.
I am sure that there are horror storied from every shipper, but I have heard far more about UPS than about FedEX.