Could you tell us what you are planning yo buy from the site?
It might help you further if we can have a look and research the seller. Like the previous users said, the site is a marketplace and you need to be sure you can trust the people you deal with on that marketplace.
To buy some service from him.
I rechecked again the seller's id, he changed his id from time to time, and I cannot identify the correct one, also when I asked for the profile on the forum, he sent different links, never sends me the correct one. So I cannot trust such a seller.
Prefer escrow services provided by good reputations.