Crafter’s Mark: The use of an item made by a famous and recognized crafter (or their guild/trade/school) may also be the equivalent of a Prestige Marker. Note that some artisans cost more even though there is no artistry – the name alone brings additional cost because of the prestige of being able to afford it. They can only work with Material Composition that are accessible in their setting.
Custom Crafting of Items: Extra time means the crafter is losing out on making easy items and gaining long term business by having stock on hand. Concentrating on a single customer for long periods generally does not bring much business to your door, unless you are highly specialized. The cost will increase even more for custom made items if the quality and properties are different than normal – because it requires specialization.