Gris Dior - Real or Fake???

Hi, I want to buy a bottle of Gris Dior from eBay as it’s a lot cheaper than new but we all know how sketchy eBay is when it comes to fakes. 
This particular one has passed all of my initial tests but I was hoping someone with a lot more knowledge can help me before I bite the bullet so to speak. 

Thank you in advance. 🙂

I think it's fake. The plastic tube / atomizer looks rough. The plastic tube should be (almost) invisible, blending with the liquid.