Chronicles of Khaldun: Crux of Eternity
Keboak is a mercane, a race of merchants specializing in magical items. He traveled out to the Elemental Chaos to find the Shields of the Sorrowfell, having apparently heard that they carry many magical items.
He also apparently has a shop in Sigil.
Image retrieved from http://www.dungeonsanddrawings.com/2011/05/mercane.html on October 22, 2016.