The new selling option appears alongside the normal “Write Post” button on some Facebook groups and asks the user to share what’s for sale, the price, a description of the item, pictures and pick up/delivery options.
Once you share the post, it formats the details nicely and others can comment with offers or discussion like a normal post would allow. The new feature appears to be an attempt to bring order to groups made with the purpose of buying and selling goods on the social network.
Once posted, Facebook doesn’t do anything further to attempt to facilitate the deal, but formats the post nicely with clear prices, delivery options and description.
The feature appears to be in testing right now, with a linked help page (which doesn’t work for everyone) explaining that Facebook is not responsible for purchases or sales made on the site but a second link to give feedback about the new feature that is broken at time of writing.
Update: Facebook has issued TNW the following statement:
We are testing a new feature within Facebook Groups to help people better organize posts about items they’d like to sell to other people on Facebook. This is a small test limited to select Facebook Groups that have active selling communities today.
Thanks to Indy Griffiths for the tip!