I agree with the posters that recommended thrift stores. On sale days, or markdown days I can get a men's shirt for $1 or less and get 1 1/2 - 2 yards of fabric out of a long sleeve shirt, depending on the size. I am vey picky about the shirts I choose to put into my stash, but there are some made from very high quality fabrics! I have nice plaids and wonderful stripes!