Andy,

I have no desire to read postal regs, I don't believe in postal insurance since it is overpriced. I would recommend trying to find a third party insurer.

My point isn't about what the post office claims they will use to determine value, just that if you pay for insurance for full value putting in a claim for the full value (assuming you insured it that high) would not be fraudulent even if the Post Office refuses to pay because they can't figure out what full value is.