How does bidding work? (Seller)

As a seller, you determine the minimum amount you want for your item. Do you get an offer? Then you can accept it by clicking on the green check mark. If you want to reject a bid, click on the red cross. You make a counter-offer by stating an amount in the 'Counter-bid' window. As soon as you accept an offer as a seller, there is a deal. You just sold your item!