Most private servers will still ban you if they catch you duping or rolling back. Check the TOS. Chances are they will tell you "NO DUPING OR USING SERVER LOOPHOLES" or some shit. One private server i played on was ownage. 3/20/20's dropped, and all you had to do to roll was add a key + the item. YOu could make shit eth too but adding a zod rune in a cube and transmuting.
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