Thank you comrade Quadro
Yes with key trading there are scammers but there are guilds who regularly buy keys. Always make them pay outside and always record.
But the case is if you always make them pay outside you won't ever get scammed.
It may be tempting to just go ahead and sell it but always stick to that one rule.
See if they have a red mark by their offer , it's a sign to avoid that player.
So when you do find a person to sell it to just wait for them to give you the life and then open the key for them. That will be it.
However some people may not trust you because you are a light blue star. Just tell them to record it, so if you were scam them you would be the one getting punished.
Good luck comrade