Tax
Auction, inc., is not a charity. The seller will be charged 10% of the winning bid price as an auction tax, in addition to any clan taxes. Tiers receive a discount of 1% per tier off the auction tax.
If an item goes unsold on auction (e.g., there are no bidders), Auction, Inc. reserves the right to confiscate the item. You may avoid this by bidding on the item yourself, but you will be charged an additional flat 10% fee on the winning bid for doing so.
If you are clanned, your clan tax also applies.