Define "higendbroker". Do you have someone in particular in mind? If so, much better to reveal the actual identity. If it’s 2juki on eBay, for example, he has a good reputation. I bought my FR64S tonearm from him, and I have been very pleased with it. Many others here have purchased cartridges from him. Chakster, who hasn’t been around here for a few years, at one point claimed that one or more of the eBay sellers (maybe including 2juki, but I am not sure) sell cartridges with non-factory serial numbers. I don’t know what became of that issue, or even if it is a real issue, but you might search these archives.