In a past life I worked claims against the government, both moving and damage caused by the military. I found that an inventory w/ serial numbers, date purchased, amount, etc. was instrumental in people getting more money. Adjusters like to have things simple. If you can document what you had, it makes them happy and there are no court cases later on. Frankly, what you paid for an item is not that important, it's documenting that you had the item and it was so old.

While on this subject - get insurance with FULL REPLACEMENT COST. The PC I am typing on depreciated 75% in the first year I had it. If it gets destroyed today, I get the price of a new one that is comparable.