I have been very lucky also at the thrift store. I paid $6 for sets of new king size flannel sheets. They were really decent quality. I washed them, but haven't taken them apart.They are measured, and each sheet is tied with a ribbon. They have a note pinned to them with the size. I am using them for the backs of quilts. I also save the scraps, and sew the different colors together to make more backing. I love the way it looks when using the different colors..