For me, it depends on price. If it's over about £70, I normally get it hallmarked. If it's under (and of course under weight), I don't. I rarely get people querying it and if they do, I offer to get it hallmarked for an extra charge. I normally have rings hallmarked as some people will turn them black quickly, so I can prove that the ring is not faulty. It's also about turnover. Many of my things are personalised and have to be sent out within 3 days, so it's just not possible to get everything hallmarked. I know the purists will shriek at that but that's just the way it is in these days of high volume internet selling.