I hope your country postal service is different from mine.
In my country, whatever the amount you assure the package for, if it gets stolen you have to demonstrate its actual value by exhibiting invoices, tickets, or any other fiscal notes. You are, in case, get paid for what it's worth, not what you paid on its assuration if you over-assured it. If you have no fiscal notes, then you get paid back absolutely NOTHING.
Back to the topic, I have been stolen of:
- three watches, 700 USD, by the Thai customs (according to TTK's word);
- two rare casebacks by someone between Oz and my country;
- two sapphire crystals by someone between my country and US. Recent and painful.