You can add a "buy it now" price if you would like to sell items at a set price. Auctions items that have Bidding and a Buy It Now price activated, the buy it now price will be removed and only bidding will be available if the bid price gets to the same amount as the buy it now price.
1) Click "Auctions" on the far left.
2) Click on "Manage Auctions".
3) Click on the Name of your auction.
4) Click on "Items".
5) Click "Add Items".
6) Click "Yes" next to "Add Buy it now" and enter the buy price.