Do the Libertarians really believe that slavery should be legal?
Some do, you bet! Many Libertarians of the anarcho-capitalist variety believe that you can’t really own something unless you can sell it. Therefore, since you own yourself you can sell yourself. They have no problems with selling yourself into slavery as long as it is “voluntary” (i.e. as long as you are starving and see no other way to get food, for instance.) Some Libs will indignantly claim that they don’t believe in slavery. Usenet threads on the subject generally reveal that at least 1/3 of Libertarians support slavery and think that it should be legal for one human being to own another.