I have been fortunate, or not so much. Since I started National Knives in 2005, I have lost a total of three (3) packages. All went to Germany, two were sent USPS Priority and tracking stopped at the border so I don't really know what exactly happened to those packages. Those two combined, amounted to a bit over $200.00 in value. The third package I lost was sent USPS Express International and I insured it for the maximum amount of $500.00. The package contained $716.94 worth of product. After it was all said and done, I received 540.80 back (500.00 for the insurance and 40.80 for the postage).
With that said, there are a couple of things I should point out. One of the packages sent USPS Priority contained a Spyderfly and could have very well been confiscated by German customs, not an excuse, but I was unaware of German knife laws at the time. The USPS Express mail package was valued at over 716.94.
Click this Link and you will note that line number 7 under "Observations" clearly states :
Germany will not accept any Express Mail International or Priority Mail International insured item valued at more than $500. Items valued at more than $500 will be returned to sender. The package was never returned to me, a true heartbreaker as one of the knives was a Paramilitary 2 w/CTS-20CP and gray G-10!
With regards to compensation, IIRC, I provided that Paypal Invoice that I had sent to the customer as evidence of value.
Here is a link to USPS :
https://www.usps.com/ship/file-insurance-claims.htm
This will give you a good idea of the time frames you have to wait to file, etc. Read through this link carefully. You want to have all your ducks in a row before filing a claim, heck, even before you send the package.
Some thoughts as to whether or not "...if it is worth it." Can you afford to lose the knife AND the money, if not, then insurance is probably a good option, depending on how often you send insured packages out. There are other options for insurance other than USPS. I don't use them, but they are out there and can be found on Google. I can't speak for reputations, reliability, etc on these third party insurance companies, that's another Google search.
My biggest complaint, not that I am complaining, is the time frame. It took over a month to see the check for 500.00 (the 40.80 was refunded to me at my local post office). I officially got the ball rolling on 8/11/2011 and the check was printed on 9/26/2011,
but it was printed and sent to me.
Hope this helps.
Rob