Ghostco, the artistic alias of Matthew Woodson, is probably one of the most underrated artists I know of. Matthew attended the School of Art in Chicago, where he currently lives and works. I’ve seen his work for a couple years now, and he continues to improve with every project he does. His use of lines and colors and texture just blows me away. I’m also a big fan of how detailed his work as, and his inventive use of transparencies.
You can purchase prints of his work over at Thumbnail Press, but the selection is kind of small and the work is older.