I think this comes from the fact that we give a lot of leeway to the definition of "supply" and "demand" in common economic talk. "I'd totally buy a Ferrari for

I think this comes from the fact that we give a lot of leeway to the definition of "supply" and "demand" in common economic talk. "I'd totally buy a Ferrari for $500" says nothing about the supply or demand for Ferraris. Economists pull demand curves out of their asses when the only verifiable facts are actual, concrete sales.