Why? Because Achmed does not sell VCRs, he sells the components for the darkest and most obscure magical rituals, to the very worst people in the city.
Which makes him sound like he is a player in the game, but that couldn't be further from the truth. He is a plaything for any faction that wants information. He folds like a deckchair but, for some reason, always seems to be 'in the know'. How does he survive?