Here's the problem with insurance. Let's say you make a great deal on a $6,000 gun for $3,000 and insure it for $8,000 'just to be safe'.

The carrier (I don't care who it is) damages it - they crack the stock at the wrist. You are pissed but you still like the gun and know a guy who can fix it.

You go make your claim, and let's assume they don't contest it. Here's your choice:

They pay you $3,000 and KEEP THE GUN. This means your good deal evaporated and you are gun-less.

or

You get nothing from them and you keep the gun

They very seldom make partial claims, and they will pay you what you can prove you paid for the gun - not what you insured it for.
You might get them to do more but only after a long and protracted battle.

They do this for two reasons - first, it prevents fraud. People would otherwise insure a light bulb for $3 Million and wait for it to break. Second, they are near-criminals themselves and they know they can get away with screwing most of their customers.