The items that are listed are old and most have been previously used at some point in time. Antique/Vintage items may show minor signs of wear such as light scratches, fading color, maker's marks, patterns, Silver items do tarnish, Scuffs, minor makers defects, sometimes dust/debris can be on/in an item.
Ceramics & Porcelain do craze this is a natural part of their life and is not damaged. Common with entire dinnerware sets, not every piece contains manufacturer marks.