Where to buy DSLR cameras for cheap?

I want to buy a Nikon D5000, with the included 18-55 lens. I don't mind if it's used or refurbished. I just want it to do it's job. The cheapest i've been able to find this model is for about 560 on ebay. But does anybody know a legitimate website where they sell maybe overstocked/floor model cameras or something like that?

I checked overstock.com and the cheapest is 600.

Amazon or b&h

If I were you, I would be checking the internet and any local camera shops that sell used equipment. They might be able to give you some advice, too. You're really not going to find anything much cheaper than 560 though.