On The Bazaar sever - spent hour killing Captive Coin Laborers for body drop of a fancy steel key to initiate The Key of the Coins quest - I avoided the Taskmasters grouped with them to get quicker respawn of Laborers.
On my first kill of Captive Coin Taskmaster got the key - so kill em all not just the Laborers.
I was 65 Bruiser; all was gray and this is a body drop.