Negative. The price is actually really good IMO.
This is not a modified pre-existing manifold, such as a ported OEM or the ST kit with all the adapting equipment. This is a new cast, and has to have the excess removed before each unit is ready for use. All the NEW manifolds such as the JMF and that flacid unicorn that CPE made are all priced much higher than $600.
I'm with everyone else in that I would love for good quality car parts to be cheaper, but that's a pipe dream.
I give corksport credit on the price point for the manifold, I would like to see someone try it out and see what the engine response is.