Realistic Fantasy/Sci-Fi Cover Design

I'm seeking an experienced cover designer for my upcoming fantasy/sci-fi novel. I'm looking for a cover that is realistic and captures the dark and mysterious (but also adventurous) mood of the story.... (Budget: $250 - $750 USD, Jobs: Art Consulting, Art Installation, Book Cover Design, Character Design, Concept Art, Digital Art, Graphic Design, Illustration, Illustrator, Photoshop)