After a little more than a year Trading bitcoin on localbitcoins and Paxful (this one was my worse experience) I can say how a possible scammer looks like.
A couple of days i got a trade on localbitcoins. I should mention that i am not selling too much bitcoin since March when I decided to ask for id.
This trader as much of scammers, was with a recent account, that is a first red flag.
They have almost no a trade record. Why, because they try to convince you to trade out of platform (one more red flag).
Later, what happens they are selling some gadgets in any other platform (Carousell, for example), they ask people to deposit in an account (and if proceed to the trade I will expect to receive the money in my account). So, when i use to receive the corresponding amount I release bitcoin (to the scammer)... So discouraging, but they don't have heart. Once I receive a call, because they use to force people to pay more and more. The buyer called me asking for his computer (he got my because the transfer was linked to my phone number) of course I said i was not linked to any other transaction but bitcoin, he didn't know about bitcoin). I cancelled the trade, i came back his last transaction and I blocked the scammer. I also reported to Paxful, but sadly they don't care. Unfortunately i was released other bitcoin in pass transactions. He lost money, the scammers insisted he need to pay more for the packing expenses. I said him: if you give more money you will lost it. And there is no way to get this people.
I hate to have phobias, but one more red flag is if he or she is Nigerian... really, maybe 90 percent of trouble is with nigerian.
Maybe i am wrong, but please take care if you find this trader on localbitcoins. After he insisted to trade on what's app and he never gave me an id, I blocked him.