At one point of time, I evidenced the similar situation when a friend of mine (sort of a lawyer / dentist / etc, meaning not an IT guy) inquired somewhere about some domain for his small business. He inquired himself first, received far from professional response from some "broker", and so asked me to step in I reviewed the negotiations on his laptop and it was Uniregistry messaging. On another end it was not a real broker hired by Uni. A diferent style. The "brokers" name was somebody I never dealt with as a domainer. And there were a couple of buttons inside the inquiry suggesting to "send a message to seller" or "contact Uniregistry support" - also an indication of self-proclaimed broker.