quilts for sale is a good site to use- very reasonable policies/costs-
mine are pretty much word of mouth- i get requests/orders too often to be able to keep up- but it takes time to build up customers- ive been making quilts and selling them for gosh- about 10 years now....the quilts for sale web site helps with finding customers.
check with local shops- we have a couple that will allow you to hang your quilts in their shop (especially if you used a pattern they sell) i've used that way a few times- just hung with (if interested in this quilt contact...)
there may even be a consignment shop you could use- before i moved there was an interior decorator who had a nice shop selling home decor- she welcomed some of my quilts/runners ect - charging a consignment fee.