I have no idea where people got this "intrinsic value" stuff from. Something has value because we prescribe it value. That is all.
I told you already where intrinsic value comes from. Try surviving without the star we call our Sun. It has intrinsic value to us. It's essential to our survival.
But you're wrong. There is no such thing as
intrinsic value. You need an economic actor to be involved. And everyone assesses value differently. But yet you still seem to dimly understand that value is subjective: "It [the sun] has intrinsic value
to us". You simply assume that everyone values the sun equally (due to some
property of the sun called "value"). Not true. A suicidal person - seconds before putting a bullet into his own head - does not
value the sun at all. To
him, the sun has no value. So, if even one person thinks the sun has no value, and someone else thinks the sun is very valuable, then logically the sun can have no
intrinsic value.
Economically speaking, there is nothing special about survival. The desire for, manner of, and value of one's survival is subjective, and so too is the value we
subjectively assign to those things that facilitate that survival. As an aside, our
differing assessments of value is what makes economic trade possible. In economics it's called "double coincidence of wants".
For example, if I want a cancer drug to cure my cancer, and you have a bottle of it you are willing to sell to me, then I need to value my money less than your cancer drug and you need to value my money more than the cancer medicine that you possess. We must value each others possessions more than we value our own. Only then can trade occur.
This was Aristotle's mistake. He (and all the ancients) believed that trade occurred when two people recognized the equality of the intrinsic value of each others possessions. But this failed to explain commerce satisfactorily and also led to the classic
paradox of value (
http://en.wikipedia.org/wiki/Paradox_of_value) also known as the diamond-water paradox (since water is essential to life, and diamonds are not, why are diamonds considered
more valuable than water?). Carl Menger solved problem. The answer is here specifically:
http://mises.org/Community/blogs/lilburne/archive/2009/07/12/231498.aspx, and here generally:
http://mises.org/Community/blogs/lilburne/pages/224503.aspx.