The following URLs are known as scam sites for personal ads: Craigsafe.org, SaferOnlineMeeting.com, thexxxblackbook.com, KingInteriorDesign.com.
E-mail may be sent from one or all of these sites (rooting through their source code, there are other sub-domains).
Each will entice the user to register, possibly giving up valuable personal information. I admit, even I was snookered by the King Interior Design site, but clues to it being fake are now obvious (hindsight LOL).
Luckily, I never use my actual info online (even for this complaints site). These sites advertise on sf.backpage.com, which is also highly suspect of internet fraud. Best stick with Craigslist, Ebay, or Amazon!