[–] CDanger 2 points (+2|-0)

What makes this painting "priceless"? I'm sure if this went up for auction it would be sold at a price. One of a kind and rare? Almost every painting is by that definition? By a famous artist? Plenty of famous artists have huge libraries of works and many of those are completely forgettable and only receive attention because of their creator. What makes a piece of art priceless?