$530 bucks isn't too terribly bad, I picked up both my webers(2) for 850 new pre-jetted and etc, and a custom manifold for my car was about 100 bux. Since then I've spent about 100 dollars on jets just to get it running decent, but I suspect once I get it on the dyno there is MUCH more jetting to be done.
It's been a bunch of fun learning how to tune carbs because it's more or less a hobby that people these days aren't willing to learn. It's really satisfying when you can pop the hood, make a couple adjustments here and there that make a big difference while people watch in amazement. Kids these days are clueless, and I think carbs are cool as hell .