At the time I ordered the grip, I didn't realise it was non genuine. I now know that it non genuine as I paid approx $170 and the genuine is approx $300. I have requested a refund or a genuine nikon replacement.
And it didn't strike you as odd that you paid almost half the retail price for the grip?
If the price makes you go "WOW", then this is already enough cause to turn it down. The only option for a genuin part to be 50% cheaper is if it has been stolen.
I went to the eGlobal site and searched for MB-D11 and you can clearly see that the Nikon grip one costs double compared to the iLion one. Next time when you are buying something take a timeout, cool down and check if everything is in order ... for example that you were not looking at LiIon but indeed at iLion ;)