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I do not ever buy the Collision Damage Waiver when renting a car. That is not to say that one should run around uninsured. That would be irresponsible and illegal in some states.
There are cheaper alternatives to rental car company insurance, some of which is even free.
One of the cheapest insurance coverages is offered through Orbitz.com. A week's car rental can get you full collision and liability coverage for under $50. That same level of coverage at most rental car companies can cost you that each day!
Rental Companies make a huge portion of their profits from insurance sales.
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