If these are quilts that you've already made, then only you can put a price tag on them. The amount of time and money that went into them is irrelevant, since it's already spent. Just ask yourself how much money would be acceptable to you. You might have a quilt that cost $100 in supplies and 40 hours of your time, but at this point in time you would rather have $75 than keep the quilt. Price accordingly and the quilts will probably sell. If you try to break even or make a profit, they probably won't sell. Generally speaking, only other quilters are aware of the time and expense involved in making a quilt, and other quilters typically don't buy quilts - they make them! (I know there are exceptions.)