Actually I don't think I would want that fabric at any price--not even a couple dollars a yard...only to be used, maybe as backing for charity quilts (I thought it quite "not attractive).
But your question was "what's the most you'd pay". I have paid almost $10 for one fat quarter from ebay of a special Israeli fabric that I wanted to put into my daughter's memory quilt (I make each child a memory quilt to take to college and she had a been on a dig in Israel so I wanted some fabric with Hebrew writing on it.)
Blush blush.