Thanks for the reply. But I'm still not convinced: Even if you allow £10 for the minfigs. That still leaves a price per piece of 6.8p/p = 52% more expensive than comparable sets like the fire brigade.
Regarding the sand green bricks: While these may currently have a high price on Bricklink due to their rarity, from TLG's perspective all colours cost the same. The only cost difference is the amount of plastic required. So the sand green colour itself doesn't justify the 50% markup.
Seems to me this is an open and shut case of TLG attempting to 'push the boat out' with the pricing - capitalising on the popularity of both Halloween and the modular buildings. I have no problem with that. Good for them. It's a great product and a great set. But IMHO it ain't 9/10 value. Personally, I don't mind waiting until next year for a better deal.