While I agree with them being a nice manifold, I think the price is just too high. I picked mine up (probably cheaper than normal, yes...but still) for $120 shipped. It's a nice flowing manifold over stock but at that price you could spend a bit more money and get a brand new aftermarket manifold with proven better flow.
Don't mean to be a dick about anything, just trying to help honestly. Maybe if the price came down a bit you'd have better luck