If I buy a quilt off line I rather get one with a label with the makers name and date. To me it adds tot he value, and the history of the quilt.
I think if you are going to do this for an income I'd sell tops over a quilt. It appears to me tops sell as they are cheaper, plus it doesn't appear sellers get a good return on their time for a finished quilt. For example, I bought a machine finished quilt for 90.00 and a top for 40.00 recently.