Earlier quoted context omitted.
The lengths at which you are going to rationalize racism just astounds me. Answer me this. How on Facebook you would expect an excluded person to be able to know about the sale? They wouldn't. The housing listing doesn't exist for them. How do you see this as fair?! I am blown away by all the casual racism all throughout this thread.
I am convinced half these commenters are just being disingenuous just for the sake of it. These sorts of cases are settled and straightforward, we have a half century of case law plus multiple publications from HUD that directly address this issue. Craigslist actually does an excellent job of summarizing the laws and giving specific examples of illegal advertisements. https://www.craigslist.org/about/FHA
Mind you, I do think that ads targeted only to e.g. certain races are crappy and probably violate the law, but that certainly isn't as obvious from the links people are providing.