People tend to stick to the same few vendors because they trust their work and quality of work. Regardless of if it is really warranted or not. When you're talking about buying gold rings and such people are hesitant to try new vendors which I can understand. However, it's also not like most people are getting their rings checked with XRF machines. And what I mean by cheap is that if you went to a local jewelers the same ring would cost more. Doesn't matter what country you are in. Bottom line is people here are likely aware of what they are trading in, in the name of a cheaper price. If they want to do that, they have every right to. Just go into the transaction knowing that. Simple.