I purchased a battery from him Dec 29, and have not heard from him either. He does not follow the pattern for a scam artist.
(His prices, while not charitable, were pretty low, and he was always helpful with sharing tips he came across.
) I have bought a few things from him without problem. He has several websites including
http://www.hpcnut.co.uk and
http://www.sigmarion3.com/ . He does not answer emails, and has not posted on his own forums since Dec 29.
I am like you, and fear something bad has happened. Car wreck? I sure hope not!