I have become a master at finding the garage sale/rummage sale bargain. Just got a roll of 48 inch wide battng for my charity quilts. I am using scraps and strings from a friend and the foundation is newspapers.
Right now, my fabric purchases have averaged $1 and are used for backing and sashing.
A retreat neighbor made a wonderful nautical looking quilt of recycled blue and white mens shirts with a red one thrown in for contrast. It was lovely and only took a weekend to make.