it is hard to donate quilts to someone who does not understand the work and money that go into making them.. I make a baby quilt basket up for my neice each year for her school and it always goes for a lot less than i have invested in it, but the school needs the money and who ever gets it , gets a great bargain, so i will continue to do so.
Maybe you could mention to someone the real Value of these quilts, they may not be aware and would be happy to up the bidding price. Maybe give a suggested price.