Thank you for posting! I adore antique quilts. You have some beauties!
It usually costs between $25-$50 per quilt appraisal. There are many different factors in determining the worth, including workmanship, the amount of quilting and the stitches per inch, the age of the piece, and rarity of design or fabrics. Paramount is the condition of the quilt. If it is frayed or cut or chewed, that seriously effects the price.
Another factor that's taken into account is provenance: who made it and when, under what circumstances, where has it been, who used it? If it was made by Eleanor Roosevelt and used by Franklin, it is going to be worth more than if it was made by my granny for my grandpa.
Again, thank you for sharing your charming collection.