The first sample was done for a car dealership services company based in Rockville, MD. I was paid several hundred dollars to produce the sample as part of the job application process. (I did not get the job.) The remaining mockups were for one of my freelance clients.
Mockups are usually preceded by "wireframes," which are crude sketches of page layouts. Needless to say, wireframes do not show well, so I've omitted them here.