Copyright laws of most European countries specify that only works created by human beings can be afforded copyright protection. The same seems to apply to current US laws (which I'm not familiar with in detail). In UK and Ireland it is possible in principle that computer generated works can be copyrighted by the person responsible for the creation of the work. So it depends on the country. Notwithstanding the above, a work may of course be sold, in this case by the owner of the printed sheet of paper.