I have never been scammed in an account sale, why? Because I do NOT buy accounts.
I've sold plenty of accounts, some of them which have a nice value, but it's very simple to just recover it and sell it elsewhere.
This is the internet after all, nobody is to be trusted.
The only tip I can give you, which have been mentioned before, only buy accounts you plan on botting(make enough $$ before it gets recovered).
Create your own accounts, hire a servicer like @Fratem or @Dbuffed (for examples) and pay more but you get your own account leveled. Y'all trying to jew accounts which will bite you in the ass. There are not even a handful of people I would even consider buying an account from...