Since he is a newcomer, I wouldn't recommend going first to him. Like ChevyDean said if he didn't make a vouch thread then don't really trust him, that doesn't mean he is not trusted but just in case use a OMM to be safe.
What do you mean you dont know where to get vouched for? Do you mean you dont know where to make a vouch thread? Its under Market>Vouches Forum> New thread at the top
Neopetgod I hope it isnt offensive but I am now doing all my homework before I trade. I have no idea were the review/vouch was. Thanks all for the help