he doesn't want to send a MO, and he only has 3 heatwares and a bit under 50 posts
That says what you need to know right there.
As sean and greg said, and trollhunters.com (maybe read it over real quick

), noobs send first. Or no deal. Otherwise you are taking a chance of getting ripped.
With your 90+ evals and he can't send first? the heck with him. in my book anyway.
With C.O.D. the post office pays you later, plus you cave extra charges. Gomeh says, have him send a money order first, or sayanora. It ain't worth the possible hassle. You are proven, he is not.
We all understand needing the moolah, but...please use common sense. If he needs any more assurance then have him email the admin of this site and trollhunters to vouche for you. If that still isn't enough. Flock em.