What is the least expensive Health Insurance I can get right now?

I have to get a major operation on my sinus, as a pre-existing condition I'm worried about the cost since I've never had health insurance before. Any reduced insurance out there for someone who doesn't have much money/income? Thanks for any links.
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health-quotes.talk4fun.net - my family have this health insurance. It is affordable and has good coverage for dental issues.
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