I bought my first real rep from DHGate and I was lucky to get a real VSF - for double the money but still...LUCKY!
There is a good chance that it is real and you'll receive a real Noob, but you have no guarantee, at all. A lot of these venders use the term Noob like we say Kleenex in North America. Others know that people don't know the difference.
If you feel lucky, and the price is <$700 USD then grab it, it may be the last new Noob Daytona anyone will see for a while. (Serious guys)
If you do get it and want to know if it is a real Noob, wind it and set the time, if it feels tight and buttery then its real (you'll know). If it feels a little loose and the autowinder winds only one way - its not a Noob. At that stage you raise hell and get your money back.