Hammer of Gathering Storms = infinite selling and refunding

We have discovered the class weapons from AQ20 can be refunded for free and sold to same vendor (Warden Haro) for gold.

Hammer of the Gathering Storm - Item - World of Warcraft

Each hammer is sold for 7g 39s

It is not too much, but if you can make a macro for refund and sell, you can make some easy gold.

Refund is by special chat bubble dialogue with NPC Warden Haro "I have lost my hammer... etc"