At the moment Groupon is selling this fan, which would appear to be a Dyson Air Multiplier fan, because the representative images are actually from Dyson.
Now the cheapest you will find these fans are in the USA, upwards of about $300. And Dyson South Africa does not even distribute them here.
So for R799 you are no doubt getting a fake, which in all likelihood is an utter piece of shyt.
and earlier today, a photo of James Dyson himself
Can Groupon get away with this? Pretty damn dodgy.