I see you are hesitant to do the person2person trading, so I will give you some tips that were given to me. First, *Meet in a public place, where there are CCTV cameras / *Second, Go with a friend or friends. / *Third, Start with small amounts, until you have built a good trust relationship with the other person.
This has worked for me in the past, and also steered me towards some good friendships with interesting new people.
Since you have some experience ~
1 ~ Do you take a laptop with you to transfer the coins, or just using your phone to do the job?
2 ~ In case you're the buyer, do you carry the money yourself or do you have a friend or family member holding it till you think everything is safe?
I have never done any peer 2 peer trading, but if I do, I like to know the tricks of decreasing every possible risk.