there is a site called--
QUILTS FOR SALE
they have very reasonable fees, and you set your price (as apposed to being at the mercy of bidders)
their quilts tend to sell for good amounts- and they have really grown in the past couple years.
visit their site-read the buyer facts/seller facts- it may be what you need.
i have a friend in northern michigan who for years made quilts for an interior designer in Chicago---she paid very well!
also some furnature shops will buy quilts to display on their beds - take them on consignment