I don't agree with the comment this trade forum is only "scammers" and we can't trade here.
I think it's one of the few trade foruns were the feedback system is well implemented (still need some improvemens).
So if you are a buyer, buy from people with good feedback, and check if this feedback it's not fake, since many people have trades for nothing with "++" and you can check what was his trade for...if he already sold another accounts for example.
Buying a LoL account it's always an act of faith, yes you should ask for the main details like email,date of creation, location. However still other can recover the account.
Use paypal as payment method, if you wanna be "safer".
But yes account it's only safe if it's really yours
, that's why I have a service of power lvl. many people think it's safer like this since they created the account with their email.