From billion-dollar yachts to diamond watches and rare art, explore 15 of the most expensive things ever purchased by the world’s wealthiest people ...

Most people assume “valuable” means luxury handbags, rare coins, or antique furniture. But the truth is, some of the most ...

A long-held lesson of economics is that the value of an item is what someone is willing to pay for it. Still, when it comes to auctions, that concept only partially explains the astronomical prices ...