How do the insanely wealthy actually pay for something worth hundreds of millions of dollars?

Today I Found Out:

But let’s imagine for a moment that a super-rich person…wanted to buy something worth millions of dollars not with a credit card, but cash. Could they? Well, surprisingly, in many countries no, with some exceptions. So let’s now talk about how the uber-wealthy actually go about paying for things worth millions upon millions of dollars.

To begin with, for the most part, paying for something worth a pile of Ferraris is the same as paying for any other item, with the fancy auction houses and stores we researched all offering the same basic payment options as stores for us peons.

As jealous as this article made me, it was actually quite interesting to find out how the filthy rich actually pay for their toys.