Thanks for your response Kenscollick, but the 4 subs listed are not damaged.
Well wasnt yours NOT damaged before the shipper got a hold of them. You should do what Kennesollick said. Also the seller sold it to you for a price. That should be the 'insured value'.
Since the seller is asking you for a fair market value (sounds like a real bonehead) tell him/her retail value and go from there. I smell some real negative feedback.
Also keep all the shipping material to show the shipper if and when a claim is submitted