I'm with Pat, insurance "no," delivery confirmation "yes!" Just went thru a trade where a couple boxes of rocks got shipped to me without delivery confirmation. When they didn't arrive after 3 weeks, I called the PO and inquired. They just said they couldn't help me, wouldn't even try...
All my valuables get delivery conf now.
Scott
P.S. the sender felt so bad about it he sent me another package which was way more than we originally agreed upon, which made me feel bad so now I have to send him something else back, which will likely result in he and I becoming well acquainted (maybe even *gasp* friends?!?) This could all be avoided by getting D.C.