Here are a few related links, including the exact same thread from a few months back:
http://www.head-fi.org/forums/showth...threadid=10278
http://www.head-fi.org/forums/showth...?threadid=2519
http://www.head-fi.org/forums/showth...?threadid=3240
Here is a summary of a few things I wrote in those threads:
The true cost of a product, especially one made by a commercial company, is not just the cost of materials. Lots of products can be built for cheaper than their retail price. The true costs of producing and selling a product commercially include:
Products/materials (the obvious one)
Production costs
Research & Development
Rent
Salaries/wages for employees (not just for the salespeople/engineers, etc., but also for the admin people, the security people, the cleaning people, etc.)
Benefits (health insurance, 401k, etc. for employees)
Insurance (to cover property, stock, accidents, etc.)
Utilities (electricity, water, phones, etc.)
Technology (computers, training, repair/upkeep)
Supplies
Advertising
Misc business expenses (licenses, accountants, lawyers, etc.)
Coffee grounds
These are all the "ongoing" costs. In addition, you have various one-time costs like improvements/remodeling, travel, sales promotions, etc.
After all of that, you have "profit."
In addition, for every step you add to the chain, you have to add in another layer of costs like those listed above (one for the manufacturer, one for the retailer, etc.)
The final thing to consider is what are known in economics as "economies of scale." If the product in question is a "necessity" or something hugely popular, the manufacturer AND the retailer can get by with minimal profit on each item because they will make up for it in quantity. Conversely, if there is a very high demand for a product, it generally costs MUCH less
per unit to manufacture that product than to manufacture a similar product which has much less demand (and does not sell in as great numbers). So for niche markets (like the market for headphone amps), where a relatively small number of products are sold, it costs more to make each product than a product similar in components and materials cost (like a CD player or radio) that sells millions of units each year; and at the same time, the revenue on each product has to be much greater in order for the business to be sustainable.