Jimmy

Jimmy turns up in the Security Hall during Brigette's Safety First quest, posing as a new recruit.¹ He offers to sell you his "cool gauntlets" for 999 coins if you trade outside the hall, then lets slip he is a detainee who fought the Security Sloth, and Brigette stops him.¹ Brigette then explains the trick: show a valuable item in the trade menu and swap it for a cheap one just before you accept.²