realbird.com is one that I use. It looks nice, easy to use. I pay about $80/year for it...unlimited listings.
It offers Facebook pages too but I think they are a waste. Your property owner, you, and maybe one or two of their friends will "Like" the page then nothing will happen and it looks dumb. LOL
Realbird is worth looking in to. (I have *no* affiliation and get no referral fees or anything for it.)