Are the coins in escrow? Make sure you make a registered shipping and if you have some reputation, please don't discriminate users in Nigeria. Even if some stolen coins made it to Nigeria, I doubt, bitmit will take care of getting you exactly the coins in escrow, so Bitmit will launder coins for you and you should be golden. So where should be the scam (for you)?
I would love to see Nigeria and all Africa to use Bitcoin. Think about where unbanked people are and think about what people might ignite for bitcoin if bitcoin works for them, so please ship that damn thing and make sure you can convince Bitmit you did, later on.