You should charge at least minimum wage...if and when I have sewed for someone, I ask $10.00/hr...if they don't want to pay that, fine, I have other things to be doing with my time. Some will pay it. I don't do it often though, would rather be doing other things with my time, as I still work full time. Maybe if I didn't also work, I wouldn't put such value on my time....but feel that if we don't care what we are worth, people won't value what we make as much.