Create a Facebook Post in Marketplace: Buy and Sell Group
1. Click on the Marketplace Icon
2. Select Homes for Sale or Rent

3. Once you’ve selected one of these options, you’ll be prompted to create the actual listing for this product. Provide all required information.
4. Upload photos - you can upload up to 10 Photos. Choose photos that will highlight your listing.

5. Once you completed all information required the next step is to choose where you would like to post it aside from the Marketplace.
6. Congratulations! Your Listing has now been posted.

Join and Interact with Facebook Groups. You can only sell something in groups that have the Buy and Sell Feature turned on.
Go to Buy and Sell then post using Sell Something Option.
Provide as much information as you can.