Someone wants to buy something from me using Paypal.
I have an account already setup. What I don't get is how
the buyer and seller is protected during the transaction.
What keeps either party from scamming the other.

If the buyer sends the money first how does he keep me from
getting the money without delivering the product and
visa versa

__________________
"What you hear in a great jazz band is the sound of democracy. “The jazz band works best when participation is shaped by intelligent communication.”
Harmony happens whenever different parts get to form a whole by means of congruity, concord, symetry, consistency, conformity, correspondence, agreement, accord, unity, consonance…….