It went for a bit over $1400 as I recall. I'm not sure there's more than that one copy known, although I'm no expert (I see one user here owns it, but for all I know he bought the one on eBay).

There was also a Thinking Man's Baseball which existed only in prototype. I think one was auctioned years ago on rec.games.board.marketplace, but I won't swear to it (it might have been Basketball).

3M Germany had a prototype called Profi Fussball - copies may or may not exist.

It exists. I´ve seen it.

This is a worthwhile grab for any fan of the band Ween - this was used for the cover of the CD "Quebec".

Personally, I don't see this as much fun at all. As an attorney, I could see most of the verdicts from a mile away, which would probably be true for anyone else even moderately involved in a legal profession. Another problem is that a number of the legal principles upon which the verdicts in the cases are based on are now fairly outdated, leading to frustration as players guess a verdict which would be true under more current law, but which is wrong under the 1960's principles of law at issue. On top of that, some of legal issues in the cases are dependent on a state's or localities' particular laws. Because law varies from jurisdiction to jurisdiction, there is always some confusion (read disagreements/arguments) about whether the verdicts are right or not.

Or you could use the "Hang 'em all and let God sort them out" gambit.

As an attorney, can you explain why the Counselor on the cover has a transparent arm?

It's hard to work out a fully developed character in a game - it's not like a novel or a film.

Sometimes they turn out a bit one-dimensional. And a bit shallow.

Speaking of lawyers-
Why do they bury lawyers 12 feet deep instead of the usual 6 feet deep?

I could, but I'd have to bill you by the hour for the answer!