You have two options. You can either sell it for a chosen number of Tokens or sell it as a Bid item where buyers will place bids. You will be able to set a minimum Token amount on your item if you wish to. For the Buy Now item, the item will be sold once a buyer agrees to pay the listed Token amount. For the Bid item, once the first acceptable bid is placed there is a 12 hour time limit, but you can accept an offer at any stage. If you have not accepted an offer, the system will accept the highest offer after the 12 hour period.