I shipped a few bars about a year back and the biz showed up with no bars...
I filed a claim and ended up with a credit on my account minus a service charge which I believe was 10%.
(So take that into consideration when you declare the value.)
Also when you need to declare a value, (wether right or wrong). I'd add on the cost what it costed you to originally ship it.
I had the recipient send me a few pictures of the box and that was all UPS needed.
In the end it took about 4 weeks to finally settle everything. All in all it was pretty simple .