Gameboy games "Sealed" Real or Fake?

[BlitZ]

Hello friends.
I was wondering about buying some Gameboy Advance games off ebay. The games I am looking for are no longer in print so you cant just go to the store and buy them enymore.
A lot of sellers claim that their games are "Factory Sealed". Can they be trusted? I mean, there is shrink wrap machines out there that can also do a "Factory seal"
Is there any way of telling if it really Factory Sealed and the game has never been opened?

Thanks

 

[Darth_Terra1]

I wouldn't fully trust it from ebay but that's my opinion on it, i'm not sure but i don't think there is a way to know if it's really been factory sealed, you just have to take their word for it, unless someone knows any different.