A few dollars. Literally. They donate all of the left-overs from classes to our local thrift shop. They bundle them up and sell them for a dollar a bag. Often I find orphan blocks, fat quarters, pre-cuts. You name it. I never know what I'm going to find in those fun bags. I have a hard time spending too much money doing this because then it's like I bought the quilt. I'd much rather make them from someone else's "cast offs".