I have posted many ads on the many items which I had to sell online. Website is good, but there is no monitoring to keep a check on people who misbehave through phone numbers updated in website. It might not be very easy but there should be some forum or some process by which if person complains about the other OLX user for misbehavior, they should block their accounts or something like this.
These platform should be more disciplined and strict so that genuine buyers and sellers can do their business in genuine ways.