If it were me, I would definitly charge $100.00 plus depending on size and the cost of materials ,or she/he gets all the materials in advance. Buyer pays half down and balance upon completion. You can never get enough for your time and talent that goes into a project. Some folks just see a quilt and want it but have no idea the cost of fabrics per yard, the time it takes to cut it, then sew together and then quilt it. All they see is a beautiful quilt with beautiful colors and designs. Dont sell yourself short. If they really want it, they will pay for it.