The other thing to consider is how much fabric you have to sell. If it's a large amount and you are only selling quilting-related things, you can advertise it as a quilter's stash sale and attract quilters from all around. They tend to be serious buyers if the price is right. If you're just trying to unload a few pieces in a regular yard sale you're less likely to have buyers for the fabric.
Around here, $4/yard or a little less is common, with $1 for FQs. My guild had a de-stashing sale and priced it as $5/pound.