Nikon D3000 from Costco?

I bought the Nikon D3000 package deal from Costco 2 years ago and now I'm thinking of selling it. I'm going to be selling the D3000 body with the 18-55mm and also the 55-200mm lens with a Nikon bag. It's in very good condition. Nothing's cracked or broken. How much do you think I could sell it for?

I would look around ebay for similar deals and be willing to negotiate.

The question next to yours is asking about getting a D80 with the same lenses at $300. Perhaps that's a fair guide for your pricing already.