I have sold many baby quilts and I charge anywhere from $50 - $100 per quilt. I only machine quilt them. (no hand quilting) The $50 quilts are larger block patterns that don't require much time and the backs are often just one large piece of fabric (mostly just flannel). The $100 quilts are generally quilt patterns that are smaller pieced blocks and the backs are sometimes pieced as well.
I get my patterns from "quick quilt" books for the $50 quilts and they may only take a day or two to make.
I have made many pet quilts as well and charge $15 - $25 per quilt for those.
I have sold many of these at craft shows.