Roy's in Bklyn had the best price I've seen so far on the "05 Pista - $499ish, and that was WITH a front brake. - the lowest I found in Manhattan was $540 without brake. The same day I was going to go pick one up, I found KHS on Craigslist.
I have never dealt with Roy's before, however they seem to run a great shop...they have some serious frames.