> but you ought to negotiate the price of every jar based on various attributes of the farm where the peanuts were grown
Not comparable because while peanut butter brands may have very different characteristics, every jar from a given product line is the same. Brand X and Brand Y do have different prices, but every jar of Brand Y is identical (jar was filled from the same giant vat) and thus the same price.
People though, are all individual. Even more granular, the exact same person can be 10X to negative, depending on job environment.
Not comparable because while peanut butter brands may have very different characteristics, every jar from a given product line is the same. Brand X and Brand Y do have different prices, but every jar of Brand Y is identical (jar was filled from the same giant vat) and thus the same price.
People though, are all individual. Even more granular, the exact same person can be 10X to negative, depending on job environment.