He is the middleman. Seeing him in a dream signifies one who points the way to good or evil according to his measure, and he is known for his selling in waking life. The unknown broker, if he goes in to a sick person, signifies his death, just as the entry of the washer [of the dead] to him signifies the broker's entry to him, because of the outcome of entering the bath.
Dream meaning · al-Nabulsi
Broker (auctioneer) دلال
Source: al-Nabulsi, Ta'tir al-Anam fi Ta'bir al-Manam, p. 120. English translation by iDreamBot. Quran verses: Quran.com, Saheeh International.