Alright let's say for example, I am selling you a Combat Arms and you liked it, so you will try to contact me and we will make a deal on how much I want for it etc etc, once you want to trade the account I recommend you contact a MPGH Offical Middle Man which will never scam you at all (If they do they will get IP Banned and will never be back on MPGH.) So once you contact a MM they would want to be there for the trade to make sure he doesn't scam you and that you don't scam him. I always recommend you have a video and or some Screenshots of you trading the account and having proof you did nothing wrong if you find out you got scammed. If you did get scammed, then we recommend you to visit the "Scammer Grave" and report the person you bought the account from and report him with all the evidence you have, if you are all correct and the MM sees that he really did scam you, they will back you up and IP Ban the person. Now I recommend you change all the information on the account once you buy it and have access to it and you should be fine.
Useful Links:
Middleman Lounge - MPGH - MultiPlayer Game Hacking - Hacks, Cheats, Trainers, Games, Downloads
Scammer Grave - MPGH - MultiPlayer Game Hacking - Hacks, Cheats, Trainers, Games, Downloads