I was at a game shop, looking for a ps3 unit.
Got the guy to open the box and noticed it was unsealed. So I asked why is it so? The reply was "We always test each unit before accepting from our supplier".
Ok, I can accept this reply.

Then was checking out the controller. It has pretty much all that is mentioned below:
How to spot a fake PS3 controller

Especially the sticker part, which contains very little information, compared to the original.

So, just walk out, without anything..