In the gold-based auction house, a 15% transaction fee will be deducted from the final sale price of a successful auction.
In the real-money auction-house, for equipment such as weapons and armor, a fixed transaction fee will be deducted from the seller for each piece of equipment successfully sold. This fee is assessed only if the item is sold. For commodities such as crafting materials, gems, gold, and other “stackable” items, a 15% transaction fee will be deducted from the total sale price.
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Note that additional fees apply for players who choose to receive the proceeds of their successful auction via PayPal™ (in regions where this option is available). See the Functionality section of this FAQ for further details.