We can know the value of something by simply conducting an auction and seeing what it sells for; that's the floor of its value. We can establish the ceiling of

We can know the value of something by simply conducting an auction and seeing what it sells for; that's the floor of its value. We can establish the ceiling of its value by seeing what it retails for. Fancy Apple laptops float around $3,000. They're not worth more than that, and not worth less.