Oh yes I ditto this....muslin is great...I love the unbleached kind and use it in my tops....I love the cotton smell of the unbleached. But for a foundation I use old sheets, pillowcases etc. Since you are machine stitching the fabric does not have to be "thin". Some times I use a flannel sheet then the quilt does not need a batt, just back and quilt. Also flannel is a great interfacing for bags. Just look at the label.....cotton is best, but nothing over a 50-50 blend. One or two cotton queen size sheet will be enough to make lots of projects and yes the price is right. I usually never spend over a dollar.