How do you know when items on craigslist are sold?

On Craigslist, items are typically marked as sold when the seller updates the listing to indicate that the item is no longer available. This often involves the seller removing the post or adding a note in the description stating that the item has been sold. Additionally, if you contact the seller and they inform you that the item is no longer for sale, that’s another clear indication. Always check back on the listing to confirm the status if you're interested.