I wouldn't be concerned about where you bought it and as I have not heard of any "fake" MVP3s on the market anywhere, you should be fine contacting Innokin directly to inquire about what might be wrong with it. If the
device is making this sound without an atty/
tank on it at the time there something is wrong sure, what it is, I could not tell you unless it is something no one else hears, in which case you simply have incredibly sensitive hearing to a particular frequency (rare but not unheard of).
While most of us discourage purchasing any
ecig gear through ebay since it is in breach of their policies which haven't changed in this regard in the last 4+yrs since implementation, your having bought it through there shouldn't effect anything if a genuine Innokin product. There may be some warranty information in the box to look to but regardless, there will be serial number to reference in communication with them on the packaging or documentation it came with. Contact Innokin about this and give them the details, you're within warranty if you only just got this, they come with a 90 day warranty by manufacturer, not the vendor that sold it so you should be fine.
Let us know how you get on and what they say
