one other tech that scammers could use (I hope I'm not giving them bad idea) is to provide pic of a legit coin, and send the fake coin :/ Noob like me would rely on online certification, but definitely not enough  
Unfortunately the coin is not close to me, but when i got it back I will provide some of my own pics

Anyway this community is strong enough I believe that as long u make a trade here, you are fine.