só os clientes definem o que é valor.

Quem determina o que é valor?
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O cliente!
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Rags Srinivasan no seu excelente blogue relata um exemplo muito interessante "Where Staircase is the Value - Inversion of Elevator Story"

"Stairs, from being a hassle for some have become the differentiating feature in renting the apartment.
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Not only are stairs more than usually important in a walk-up, but, he said, “you hear renters say that they are looking for something with character — that character is an amenity. The staircase is a great place to find that, because it is the place where interactions with neighbors happen.”
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It sure adds more credence to the theory that it is customers who decide value and it is the job of marketer to understand that  and deliver them a product that delivers them that value. Of course the marketer gets to share that value in the form of better price realization."

Num postal anterior ele tinha defendido que os apartamentos com escadas, sem elevador, eram penalizados por isso...  só os clientes definem o que é valor.