In the definition of value you will find the word worth. It is a inherent part of value. If it is in abundance it is worth less. If it is scarce and your need for it is greater it becomes more valuable. It is a natural need not a want.
Undiscovered penicillin has zero value as it is not needed nor is its presence detected. Inalienable rights are akin to penicillin. Once discovered they have some value but if it is taken you don't die because it is not needed in order to maintain the ability. Rights are things people want to have in order to empower themselves to exercise their abilities.
Well if you argue that there is no difference between 'value' and 'worth' then we are back to arguing silly semantics--like some want to argue that the definition of unalienable is the same thing as unalienable rights--even though some do use the two terms of 'value' and 'worth', usually erroneously, interchangeably.
The way I see it:
"Worth" indicates a quantitative or tangible price that one is willing to pay or attribute to something. And that indeed can rise and fall depending on supply and demand.
"Value" is the importance or significance of something. The importance may increase or decrease depending on the urgency of any given situation--for example, how much I value my 'right to life' would not be important in the moments when I risk my life to save my child from imminent danger. And some memento given to us by a parent or grandparent or some other significant person might be worthless as far as what it could be sold for, yet have great value to us personally.
For those who would benefit from it, penicillin is just as important and has value whether it is free or priced like gold, whether it is available or unavailable to us, whether it is discovered or undiscovered. And it exists.
For those who value liberty, unalienable rights have incalculable value as liberty cannot exist without them. Whatever 'rights' aka permissions are granted by a government are not the same thing as what the government allows can be just as easily disallowed.
The U.S Constitution is based on the concept that unalienable rights exist and it is the role of government to recognize and secure them and must never interfere or prohibit the free exercise of them. It is the concept that unalieanble rights exist and cannot be invented or ordained by any government..
And what is an unalienable right? It is whatever requires no contribution or participation by any other and does not infringe on anybody else's ability to enjoy and exercise their rights.