So many people complain about people being keylogged or revoked. I just have to say a few things. Even if a middleman is their on a trade, you can be revoked. Being revoked is when the seller creates a email with information before selling the account. Middleman have zero control of this. In sense, you are never going to be 100% safe when trading online.
Try to find sellers that are active in the marketplace that have been on MPGH for at least 3 months.
Try to find sellers that have more than 300-400 posts AT LEAST.
Try to find sellers that have posted in other sections or games. Not just marketplace.
Try to find sellers that are willing to talk about deals more.
Try to be careful when on MPGH and purchasing accounts.