Then you kick off an arms race where regulators are constantly fighting to keep up with increasingly sophisticated money laundering techniques to obscure how valuable an IP actually is. A lot of money would be siphoned off by lawyers just so they can fight back to a stalemate.

Why make it complicated? Just let works fall into the public domain after a couple decades.

Indeed, the one thing that can't be manipulated by dubious actors is time.

That introduces a massive accounting element. At least the current system is simple. By all means, shorten copyright terms. But let's not make it a complex mess that no one can really figure out.

"Hollywood Accounting" just means that works will never generate a profit..

So include a condition like "for twice the (undervalued) amount you state, anybody can ...".

If they price they quoted was fair, they should be more than happy to sell it for twice that. If it was too low, well shouldn't have lied. If it is too high, more money to the public.