There's a separate "evaluation" sub-forum, but in the interest of timeliness: if it fits you, go BUY it. Diaments are rarely seen in the US, but this looks like a fine bike and, at least by my jaded SF measure, a really good price.
I helped a friend buy a Diament several years ago and he was very pleased with his...this one looks even nicer.
Edit: I didn't read the whole ad, see now it's for frame set only with BB...not bad for $250, but not as smokin' a deal...except you don't get a load of mis-matched parts along with a really nice frame for your $250, a blessing in disguise!
Last edited by unworthy1; 05-28-12 at 06:10 PM.