The Jesus Freaks Will Hate This

[Mudhammam]

http://en.wikipedia.org/wiki/Voluntary_slavery

Voluntary slavery (or self-sale) is the condition of slavery entered into at a point of voluntary consent. In ancient times, this was a common way for impoverished people to provide subsistence for themselves or their family and provision was made for this in law. For example, the code of Hammurabi stated that "besides being able to borrow on personal security, an individual might sell himself or a family member into slavery." In medieval Russia, self-sale was the main source of slaves.

In ancient times, one of the most direct ways to become a Roman or Greek citizen was by means of a self-sale contract. The laws surrounding Roman and Greek manumission made it quite possible for such erstwhile slaves to then become citizens or near-citizens themselves.

Obviously a citizen (in this case, a person belonging to a tribe of Yaho) who happened to be poor and offer his services or one of his family members as a payment of debt (I sincerely hope this isn't a practice you're attempting to justify) is not quite the same thing as owning captured foreigners and selling/trading/using them as property, which Yaho's people also did. When you cite verses prohibiting murder that appear to contradict those involving cases where a slave was beaten and then died later, you're ignoring the fact that one law was given as a contract between Hebrews and their allies, another given for enemies and foreign slaves.

Explain how you still figure it's permanent?
According to Leviticus, slaves and prisoners would be freed, debts would be forgiven and the mercies of God would be particularly manifest.

Eh, no, that's not quite how it worked, bud.
http://tifwe.org/resources/five-myths-about-jubilee/

Poor and/or foreign slaves weren't freed and debts weren't forgiven (that would be so nice though, wouldn't it?)