Research as much as you can about fairy art, fairy artists and fairy periodicals such as "Faerie Times." The more opportunities you know about, the more possibilities you have to sell your art.
List your fairy art on a site such as Etsy or Ebay. Set a minimum price to decrease the risk of underselling your art. List your fairy art in several price ranges to increase your chances of selling. Listing prints for sale also amps up your art's visibility and popularity, raising demand for your original fairy art.
Rent a table or space and sell your fairy art at festivals and craft fairs. Renting a spot can be expensive, so find out the average amount of traffic you can expect at the event to decide whether it is worth it. Fairy art tends to be popular at medieval and Gothic festivals. Be open to opportunities at alternative and possibly lucrative unconventional events.
Buy this year's copy of "The Artist's & Graphic Designer's Market." This book is a definitive artist's and illustrator's resource. It contains a plethora of information for licensing prints, posters, greeting cards, lithographs or canvas copies of your art.