i wouldnt buy off ebay... why?
1-once the sellers got has ya money he may report the phone stolen.
2-find out if its got 2 sim slots or 1... if 2 its a fake.
3-enquire wether its got wifi.. if not its a fake
4-if it has built in antenna for tv then its * fake
5- if the price is too good then look for fraud or scam


but to be honest if you personaly dont know the seller then buying a up todate phone from a non business entity is very risky....