I would charge $50.00. It's not like you're doing them for a friend. It sounds like your bags are being admired and thus creating the market for them. As far as having the material already--that shouldn't be a factor as far as I'm concerned-you had to buy the fabric at one time and, sometime in the future, you will be buying more (which will probably cost more anyway) Just my 2 cents for what it's worth.. LOL Sue