How do dupe runes poof?

[PoTatoes]

To expand on Bloods post:

You temp perm by opening and closing a trade window with a person, and then leaving the game. If either you or them enter a different trade window or use a waypoint before you are able to leave, you will need to temp perm again. (So be quick)

What this does is remove the "flag" Blizzard has on the item. This is caused because it has the same item ID as another item in the game, and it knows that it was duped.

There are also rumors selling the item and rebuying from an in game merchant will work, but I cannot guarantee this.

i wouldnt try selling it cuz either theres a possibility u dont have enough gold or if its an soj ur screwed. i would think it would work, but not worth trying