Not intellectual property. IP is copyrights, patents, trademarks. You want commercial litigation.
That said, the fair settlement is the cost to replace the destroyed items plus the diminished value of the damaged items. What would the cost be to buy a comparably used leather coach and grill? They should have insurance that pays for damaged property that will happen from time to time in that line of work.
Proper settlement has nothing to do with the fee you paid for them to move you. If replacement of the destroyed goods is $800, then that can be a fair settlement. If they don't want to resolve this with you fairly, you should take this issue to small claims court with photos of the damaged goods and, if possible, photos of the goods prior to the damage.
Answered on Nov 12th, 2013 at 2:07 PM