With regards to the $295 price tag:
I was really expecting this figure to be around $240-$250, and was shocked to see the price.
However, after more thought, I'm thinking since this figure was soooo limited that would drive up the cost to produce each figure since they were only making a low quantity.
I wonder how much they would have to charge to make a profit if only 100 of these were produced? $500-$700? Now how about if they made 10,000 of these how much would they charge? $220-$240?
Your train of thought is right if this had parts or accessories that had molds made specificly for this offering. But aside from the base all of these parts are from another set. The head is from the 42, the body is just a repaint and the Chitauri weapon is from Cap (and will surly be used again if they ever actually produce the foot soldier). So basically the price IS a bit surprising but basically you're paying $50 extra for the exclusivity of this set