Yep - that sounds about right to me.
Lots of choices on intakes, but I like this one at $519.
Cobra 289-302 Intake Manifold
I have used and liked the Torker, although I don't think it is made anymore. I've heard good things about Performer RPM and Weiand Stealth.
Used, the intakes are going to be around at least 1/2 New they are all around $500.
Carburetors run from roughly $300 to $700.