Steps:
1. Enter in Ninja Saga
2. Open Charles
3. Now Buy Item That you want to sell
4. Then Sell the Item you bought
5. In Charles Expand the "http://app.ninjasaga.com" > "amf/"
6. Now Right Click "(CharacterDAO.sellitem)" Select "Repeat Adv"
7. Iteration : 100000 ! Concurrentcy : 5
8. Now Leave for to 5 to 10minute UP
9. When You Satisfied, Click "Option" > "Clear" to Save the GAME
10. Done, Refresh the Game Now.(Watch the Video if unclear)

Video: