you can do an advanced search on e-bay with the "completed auctions" box checked. That will give you an idea of actual selling prices. Like JackieG said, even her fabric costs weren't covered by the selling price. Etsy has soooooo many things for sale, you would need to find a way for yours to stand out. Have you tried local flea markets, craft/antique malls, and gift shops? Summer's coming, and festivals and farmer's markets, flea markets and such will be opening up.
If you are not confident in your quilting skills, you may want to tie them or use turkey tracks. Tops alone are just seen by many as unfinished projects that they do not want to tackle.
You can get business cards cheap online - Vistaprint.com is one of many. Every bulletin board, craft store, fabric shop, and gift shop should get one. If you bring a portfolio of pictures of your work when dropping off your card, and a small sample so they can judge the quality, you may get some offers coming your way.
Just realize that the economy does not allow splurges on things "just for pretty" and it won't be easy to get top dollar even with great skill and top-notch materials. Good luck.