That is what I have been told the whole year that I have been doing it
including selling bitcoin on ebay when you could still do that.
I have a system it is not perfect but this is the basics. I never send first, I only trade with people who will reveal their identities or who have an insane amount of feedback, and I build trust over the course of time that is probably the biggest part of it.
I have had charge backs some that were pretty painful.