Help Desk is an arts-advice column that demystifies practices for artists, writers, curators, collectors, patrons, and the general public. Submit your questions anonymously here. All submissions become the property of Daily Serving. Help Desk is cosponsored by KQED.org. We recently sold a piece at an art fair, a photograph, the sale being the second of this particular edition. Because it was the second edition, we needed[…..]