You are already at the auction page?

Very good. Now click on the little tab called "Sell":

To sell an item just click on the item you want to sell. The system opens a pop up which allows you to sell the respective. In case this pop up does not open please make sure that you allow pop ups in your browser setup:

You can choose the number of items you want to sell from the drop down list now and afterwards have to confirm the selling:

Now you see the item you sell listed in the table above the items you own:

In the first 5 minutes after you placed your item on the auction market you are still able to cancel the selling by clicking on the red x in front of the line:

The following items can be sold in stocks of 5, 10, 30 and 50: bandages, cages, scrolls, ointments and tablets of law.

In the case no player buys your item(s), the system will buy it for the initial price (for example, it will pay 100 Silver for a helmet or 1 Silver for an ointment).

Please note that Geldings can only be sold in case you have another horse in your inventory or equipped to your hero. Furthermore they cannot be sold to players but only to the system. This means in case you sell a Gelding you will always get 100 Silver for it.