gp = gold pieces

Although, in an anarchistic world you could have some trusted institution, such as a bank (hold your laughter), print money.
Rocket-dodger:
So the real question is -- once rationally self-interested corporations work together to gain an advantage in the market, is it still a free-market?
When corporations cooperate rather than compete you get a cartel, but cartels should be allowed to form as freedom of association. Hah! I'd like to see them try it because
another corporation will swoop right in, charge lower rates, and take away their business.
Robert Nozick took anarchism seriously in
Anarchy, State, and Utopia, but argued a minimal state could arise through non-coercive means and stick around as a natural monopoly (anarchist Rothbard mocked this as the "immaculate conception of the state"). Libertarians must always contend with the problem that there are some people who say they will provide their own security and therefore do not even want to pay taxes to the minimal state. Jonathan Wolff has an excellent book (link below) criticizing Nozick and libertarianism using the example of John Wayne types.
http://www.amazon.com/Robert-Nozick...8563/ref=sr_1_1?ie=UTF8&qid=1248369210&sr=8-1
Did this thread shoot off of one about taxes? A quick point on taxes and those minarchists (such as Ayn Rand) who want "voluntary taxes"/donations or lotteries. Taxes are a good thing. You want the state dependent on the broadest possible swath of the citizenry so that it remains responsive and accountable to the citizenry. If it relied on donations or natural resources (e.g. Saudi Arabia), then it invites corruption and autocracy.
There are reasons why in the most recent issue of of
Foreign Policy oil-rich-tax-grabbing Norway ranks as the most stable state in the world and free-market Somolia is the most failed state. Which country (or "country") do people on the Von Mises site and
Reason Magazine criticize and which one do they praise? Libertarians are historically illiterate, economically indoctrinated and politically naive... which would all be OK if so many of them weren't morally loathsome.