I am forever fascinated by the collecting mind, no matter what it is that draws one’s fancy — comic books, coins, postage stamps, match boxes, dinky cars, film memorabilia, antique cars — because they all have something in common: passion, knowledge, competitiveness, something that sets one apart from the herd. Even among them, the art collector is a distinctive breed because of an absence of defined absolutes that lend value to the objects of one’s desire. With art, so much is subjective — no matter what experts say — that it is not unusual to spend quite extraordinary values on something one covets without being able to justify it. How much would you pay for the Mona Lisa, for instance? Such works are priceless because they have the ability to draw eyeballs and footfalls; no wonder the Louvre Abu Dhabi (or its promoter) paid $450 million for Leonardo da Vinci’s Salvatore Mundi. It makes a great marketing case study, how a single object can be a museum’s greatest draw while also overwhelming a collection to its detriment.

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