Was it original date coded parts? That seems to make a big difference as to what people pay on Ebay. Current intakes can be had for around $350, I've seen originals go for at least a couple hundred more. Same with the aircleaner setup, $350 for new, $450-$500 or more for original. Carbs are more of a crap shoot, rebuildable orginals maybe $600-700, new seem to go for $1100-1200, linkage, fuel lines, etc. add another $100+ so you can see it adds up. Whole setups including installation kit are available new for around $2500 if you're not concerned with 'original' parts.
Later, Jim