A loose painting of some invading walker-type aliens at a harbor, set some-when in the future. Initially it was set in a more technological environment but I decided to tone it down. All done in Photoshop. This image is a personal project, so doesn't belong to anyone else, i.e. a client. The full license for this image is £40 ($60).
A similar quick concept would take a day to do (including revisions). The cost would be £100 ($160).