I've done well through the years (I am female and older) selling tools and sports equipment in NY and Asheville. Ah, sold my ten-year old car quickly and a motorcycle just as fast - good poses and facts help. But most people here still ask stupid questions (ignore them and move on). Take photos, price your items well and they move. Sure, there are some flakes but c'est la vie. I never had a no show. No want when they came to my place, yes. But that's okay.
House rentals or selling: Don't even bother. We ended up at one final CL ad (we had had it with the junk on CL) and called the agent (?) and said never send us to a dump like that again. It doesn't work for rentals or selling. Use an agent or the MLS or Mountain Xpress.
Personals: Most people seem to be illiterate. In women only, they are mostly men posing as women or pretending to look for their chick. So, I'd read and report - one couple wanted a woman for polygamy (I explained what illegal means) or just stay clear.
The monitoring is baloney and automated. I wouldn't bother with it.