I think you're in line with the going rate...but you *do* have to look honestly at yourself and your skills and ask...are my skills on par with what others are doing? If you've got a lot of room for improvement, you can't really ask the same rates as someone who would be considered a master quilter, kwim?
And, you've gotta understand what the market will bear. I saw this AWESOME red and white quilt at Kohl's the other day by Chaps. Very vintage looking. Very doable for many quilters' experience level. And they were charging $200 for a queen, kwim?