Cost of a live whale

Let’s say that I am very wealthy and want to obtain a Killer Whale to have as a pet. Aside from the costs of building a suitable aquarium and buying food and such (and the ethics of keeping live whales enclosed), how much would it cost me just to buy a whale?

This is from 2002:

“Currently, there are about fifty orcas in aquariums and amusement parks around the world, and their scarcity has made them each worth a million dollars or more.”

(Found here.)