Dynamic Ads - this is Facebook's paid advert service (similar to Google Adsense) where you decide which demographic of people see your ads, and you pay based on the number of views or clicks the ads generate.

Facebook Marketplace - this is Facebook's classified ads section where people can search for the items they want (including real estate sales and rentals). This is a free service.

(Your) Facebook Timeline - this is where your listings are drip-fed to your Facebook pages, a few at a time, to look like you entered them yourself over time. The cost for this is £5 a month plus a £20 setup fee.