Wow. That is disappointing. (off the site I would use much stronger language.)
I have given more credit to members of this (and other) forums when it came to parts and services. But I too have found this can be a trap. Funny thing is I have been buying over the internet (mostly through Ebay) for nearly a quarter of a century. In that time I have only been ripped of once (maybe twice) and more often than not very happy with my dealings.
But like Matt I'm now out of pocket hundreds of dollars and no parts to show for it. And I would say the experience is leaving me feeling I won't bother doing business with any other forum members in the future. It just leaves too bad a feeling in the pit of your stomach.
I won't mention his name but he advertises on here a lot.(under a fake name as well).
Caveat Emptor.