We have been providing specifics since before you made your first post, you just fail to read or like to insert made up numbers into the conversation to confound the issue. The lavatube (or power VV as I believe its called on the global level) is a prime example of true mass production lowering cost. I am not even sure the Darwin is produced on that large of a scale, it has one retailer on the planet as far as I know and I have never seen him have hundreds in stock.
You asked a series of questions that had little to no relevance on the example already given so I ignored it as I assumed if you couldn't derive this information yourself you never would, or that you had and were just being difficult, but lets address them.
Both of these address some guy trying to build a mod or even some new chinese company moving into the market, but neither seem to understand the more likely scenario is that one of the existing globally active electronic cigarette manufacturing companies will just decide they will wedge themselves into the mod market and use already existing supply chains to do so. They already have wholesale contacts in the USA, Canada, Spain, U.k., Italy, probably the rest of the E.U., and whatever they have in Asia.
This Scenario is playing out now with a company that developed a Provari like device, using the lower cost of manufacturing, its already existing R&D and manufacturing capabilities, and its already existing relationship and knowledge of vendors across the globe. Then contacted its already existing global contacts and offered the unit for a competitive price, at least 3 suppliers have signed on to this that we know of (we being the people who have followed it for a bit, and who don't live in the new members forum), meaning before the first unit goes out it has preorders for at a minimum 1,500 units.
This is more than just some thought experiment its a description of how its moving along right now, the end result is a device that sales from the manufacturer for 30 dollars each. Is it a Provari clone? No its aluminum vs SS, it uses a larger battery by default, and I don't think it has atty ohm detectors on it (a rather gimmicky feature since, unlike the darwin, the provari doesn't actually do anything with that knowledge and you adjust to taste anyway), yet I doubt those two saving account for the $120 dollar difference between the devices (more if you try and upgrade the provari to use a comparable battery). Seeing as the Provari is made domestically and has no middle man supply chain you would expect it to be able to at least compete with the Lavatube post-shipping post-middle man mark up, but it is in fact twice the price of the projected costs of the Lavatube.
This is what I meant when I said China will make similar units with similar tech (at least from the users point of view) for less and what I meant by mass produced. It will take about 30 days to see the end result of this (I think 17 days from now these go on sale in the U.S., perhaps earlier in Europe). We can come back then and compare notes.