I don't know all those people come up with their prices, but here's how I come up with mine. I figure up about how much the fabric would cost to replace what I used(whether I already had it or whether I bought it for that quilt), including the thread,rotary blade if I had to change it out,and don't forget the backing and batting. Then I double that amount and pay myself $10 an hour for the labor.If you only charge enough to cover materials, you will get very tired of doing all that beautiful quilt work for nothing. And you can use your profit to buy fabric for more quilts.After about the first 5 quilts I never had to use my personal money for quilt supplies again.