I bought some LEGO pieces from eBay, and I'm not sure if they are genuine LEGO.
I compared them with my LEGO, and every piece of my LEGO has the logo ©LEGO on it. However, only some of the ones I bought have this logo, and some do not.
You can see the © symbol on the top gun, the bottom is a gun from my own LEGO collection. If you flip them over, my gun (bottom) has some numbers (I think manufacturing number) and the word LEGO on it. The new one (top) has nothing. Is the top gun just an older LEGO, or a fake knockoff?
Additionally, some of the battledroid torsos have the © LEGO mark on them, as well as some numbers, and some of them have just © and nothing else.
It is the same with the battledroid heads. On the left, my genuine part has the ©LEGO and numbers on the other side. On the new ones in question (right), there is nothing.