The check that bought the rights to Superman has sold, and for quite the pretty penny. Imagine having so much money that you spend over $100k on a check? Yeah, I can’t neither.
You can buy the check that bought the rights to Superman. Now in my world in the Multiverse where I rule supreme atop a throne of golden Diet Dew cans, with Jennifer Lawrence a-clutching my perfectly chiseled biceps and cooing at me, this would give you the rights to the actual comic character.