@Sherman M.
I am not Real Estate agent, but I do have experience with Facebook ads, because we have used them for hiring at our sawmill, and we had a lot of luck with them in that respect. But when we tried to use them to find new clients, our success was quite limited. You might give it a try if you know what your target market is for a particular house. But, I would say if you're looking to list some houses and get more eyes on them. You might try the idea of just a page promotion to get a high quantity of eyes on your page, and then post your listings one at a time after you have raised the number of likes on your page, so that those people who liked your page can now check out your listings. Also, definitely say something whenever you do actually post a house on Facebook. Put a little description, and if you're good at it, throw some humor or something in the description to attract "likes and shares"... By doing this the algorithm's that run facebook, will naturally direct more eyes to your post. Because your post is getting some "response." .. Oh, and take a quick course, or read up on Facebook ads online. There is a ton of useful information out there.