I am so sorry that this happened to you. What an aggravating heartbreak!!!! The tips you've been given by the board members are excellent, so I won't offer any more. If you are looking for a quilt appraiser, google Bobbie Aug. She might be able to help with a photo appraisal. I am including a YouTube video that might also help.
http://www.youtube.com/watch?v=9jnc_rPKsCg