Today i was grinding hillsbrad farmers, and i pickpocketed a Battered Junkbox. so i opened it, etc etc. Enough chit chat, down to the exploit.
First, get yourself a Junkbox/Locked box (NOT CONFIRMED WITH LOCKED BOX, CONFIRMED WITH JUNKBOX) unfortunatly i have not found one to test.
unlock the box, but DO NOT open.
*:IMPORTANT--HAVE AUTO LOOT ON:* and attack an enemy, and hit an instant attack (for me i hit sinister strike), and AT THE SAME TIME open the locked box in your bag. you WILL get the money, and the locked box will still be there. Now do it again once you have enough energy, and the box will still be there! i tested this 5 times, worked every time.
So basically i earned 1 silver for every sinister strike. It adds up!
If anyone can confirm this with locked box, or try it, would be great. i doubt you will get the item more than once, but the money i am almost certain you will.