For a simple pattern, I suggest the price of the material (backing, batting, thread too) and double it. If the quilting is super custom (feathering, line work, etc) I triple the cost of the material. It goes up if the pattern is original or more intricate. It truly ends up being around $500 for a simple, slightly custom (flowers/butterflies), full-size quilt. I don't think people realize what an expensive habit this is! :)