While I've not shipped a lot of items of +$1K, there have been a few. Because those packages were very large oversized boxes, USPS would have been prohibitively expensive so I used Fedex and their "indemnity" coverage. IMO, "indemnity" is ambiguous, is NOT insurance and should a loss occur, I was informed by the person when I sent the package that I probably wouldn't get full value of what the item sold for. (Lucky for me, the packages got there without incident and I didn't have to test their system.
As for using USPS and its insurance, there are a couple of things to keep in mind, mainly for domestic shipments.
- most items get to their destinations. (In my own experience, of over 4000 shipments I've made in over 15 years, only 2 or 3 have been lost. Of those, only 1 had insurance and it was a PITA getting them to pay out even though it was clear that no delivery was made.)
- even if a USPS item is insured, if tracking shows delivery, USPS won't pay a claim for a lost/non-delivered. They don't care if it's stolen from a porch or mailbox.
- If an item has been rifled, tampered or broken, again, winning a claim is an exercise in patience. They do all they can to avoid paying and it's up to the sender and recipient to show negligence. If an item is fragile and the sender didn't mark it as such, USPS will place blame on the sender for not packing properly and for not marking the package as "fragile."
For items $750+, you
do need signature confirmation and USPS is aware and getting better at collecting signatures when the service has been paid for. That's an additional service you have to pay for.
It's very rare that I put insurance on an item and it's usually cases where I have an uncomfortable feeling about the buyer or the transaction. It usually has nothing to do with the value of the item.