Replying to Anyone shipped things internationally? advise please!

So I got this dude wanting to ship an item to nigeria for him.... to his "store".

He has offered about $100 extra on top of my list price to cover shipping but I've never shipped internationally and even though he is going to pay with paypal I still have some second thoughts... I just don't want to get screwed over.

Advise please. IF he uses paypal will everything be cool because I'll be covered from getting screwed or no?

need advise asap.