The cost should also account for the work put in and the years of experience and know how to pull it off. It cost you $10, but it would cost me several hundreds or even thousands to pay experts to do it for me.
How is that relevant? When calculating my home's value should I add the cost of my college tuition? I wouldn't have my job without my degree, and I wouldn't have my house without my job.
Classic HN comment: criticize someone else's cool idea to make one's self feel better about not having that idea.