Want ads are to be submitted in the Marketplace at RCU. It's free and is the only place allowed. If there are others as you say, please feel free to hit the "Report" link in the post and a moderator will remove those as well.

The moderators are instructed to contact each member after a thread or post has been edited or removed, so you should have been contacted. It's possible it's in your RCU PM Inbox or a spam filter grabbed the email. It's also possible the moderator didn't notify you, which I then would consider a problem.