Try
www.dhl.comDHL next time. Costs more but it will get there , and in one piece, and they'll pickup at your convenience within a 2 hour window.
A few years ago I was getting ready to ship something very rare and did some research. the pose office site was bragging about how many packages they handled every day, how many got delivered every day, average size, weight etc and quietly on a back page mentioning a percentage that disappeared every day, and later recovered, and percentage that disappeared , never to be seen again. A little quick simple math and I figured out the the USPS looses enough packages, never to be seen again, every single day, to fill a very , VERY large airplane hanger
If you just have to use USPS, insure your package for at least $85 .Below $80 they don't have to get a signature and packages have a habit of growing legs

, above $80 they have to get a signature.
Recently, we finally got a good letter carrier ( and I'm bein' real good to her, fixin' her car and everything, even though it is a Subaru

All joking aside, she's good people

but before her, the only time we would get our packages and mail is when one of the neighbors who had got it delivered to them , had the time to bring it by, and when we got someone elses, we'd have to drop theirs. It was a daily rural musical mailbox game.
-----------Robert