To do this, simply navigate to the item you wish to sell and click "Sell". You'll then be guided through the instructions for selling the item. Note that you can also sell multiple items all at once through the "bundle" feature.
Additionally, check out ChainBreakers, which did a large portion of its sale by simply selling bundles of pre-minted items.
Updated about 2 months ago
Next we'll learn how to create a custom sale contract for a slightly more advanced sale