Unfortunately it is very hard to put a price tag on a quilt. For those of us who have tried to sell them or get tax credit for donating one it has been almost an impossible task. I won a king size raffle quilt from another guild's raffle. While it is lovely it doesn't match any of the color schemes in my home and is really to big for our bed and bedroom. I attempted to find a way to get it appraised so that I could donate it to our local Senior Center for them to raffle off and take a tax deduction. The friend who had sold me the ticket said the guild had spent $400 on the fabrics and the quilting was donated by a member who was a long armer. In the right market and under the right circumstances it would probably sell for at least $1000. Only those of us who are quilters truly recognize the worth of a quilt.
Good luck with getting anything out of your insurance company.