I just went to a small quilt show in Paducah, Ky. It was sponsored by the Paducah quilting guild. They had bundled packages of fabric priced $3-$5. I bought several of these bags for under $20. Some of the pieces were really nice--like 2 yardseach. I got my money's worth.
Most of the time I try to have a project in mind before I buy unless it is a real good price and that I know I will use later.