Its both, a hit and a miss, when it comes to what's for sale, if its a person or a retailer pretending to be a person with something new to sell opposed to something used. Then there is always, " I was away on holidays" whenever you get a reply a few weeks later. Then there are those ads which go fishing for email addresses which provide the spam a few days after you reply. When it comes to selling, I have had fewer issues although there are plenty of LEGAL things being sold which they won't allow any listings for which brings things to the final hit and a miss scenario of which I'm writing.