I went to a yard sale recently that was an estate sale of a quilter. Her daughter had her mother's quilting friends price the fabric. They priced it at LQS prices per yard and it was VERY expensive. The sale started on Friday and when I went on Saturday, there was still a lot of fabric left. I came away with some great rulers, templates and magazines, but no fabric. It was too rich for my blood, especially for a yard sale.
When my mom, who was a quilter passed, we sold some of hers and I marked it reasonablly. It was all gone within an hour. I did the same thing when my "sister of my heart" passed with her quilting fabric and again, it sold quickly. Of course I picked out what I wanted, but there was SO much, I didn't have room to store it all and I knew it would find good homes.