Looking for a nice Scbapro A700 second stage regulator. My son complains of dry mouth and this is about the only way I can think of to keep him interested in diving as a metal second stage helps the air be less dry. Don't need a first stage but if it is the only to get one, I will consider it. Prefer used, but something nice and not beat up. Not looking for new. Will be pairing it with a Scubapro Mark 17.