I'm not fabricating anything. And this is not random picture.

If someone has misjudged the value of this painting and overpaid it, it's whether his choice or his mistake.

As I said, pricing is a complex process, and I was just denying having said that marginal cost is the only factor that intervenes.

But a zero marginal cost does reduce price through time, whatever the initial price was.

Also, a painting is always a unique object, so marginal cost concept doesn't apply there, by definition. If it was possible to exactly and physically reproduce this painting, the price of one copy would eventually fall to zero, even if the first instance initially was worth $1M.