Price like beauty is in the eye of the beholder, what something is 'worth' is always a tricky subject and people will often not think about production runs/materials etc etc etc when makung up thier minds about wether a product is worth it or not.
For me I look arount at what else £150 could buy me, and theres a lot, the 1966 Batman or Robin, anything DiD with change, Sideshow droid 2-pack with change and more and all these for me offer better value for money and are more 'worth it'
A companies product pricing structure is key to thier continued success and i'm afraid in my opinion BCS haven't placed thier products at the right price point and are going down the 'make less, charge more' road. I have no idea how this is working out for them but seeing as they have only just sold out of the 10th doc, had a fire sale on Amy and the 4th it would seem not that great a policy.
I should stress that I have absolutely no knowledge of what goes on in the making of a 1/6 product of any kind and am merely a end user/buyer of 1/6 product and as such while these are a good product for me they are not worth it, I have no doubt they will all sell in the end and then hit ebay for laughable prices.