Is Scamming in a game with real money illegal?

Yea so i was playing minecraft a guy came on and said he'd pay me in game money for my real life money And i was hooked it was very cheap but it wasn't official from the server So i payed the guy money and he sent me the money in game next he said he had more and i had figured he wasn't a scammer since he had kept his promise from before and given me the in game money So i sent him a bit more money only 20$ but still. This time he didn't send the in game money and got out of contact with me I would just like to know if this is illegal and if i can get this guy in trouble for this because scamming is wrong. And i feel if you do get scammed its not a very good feeling