I know a bunch of folks sell their old iPhone in preparation for the new one & I am considering doing that with mine. The problem is that my 32GB black 3GS has been around the block a few times. I have never had a cover on it. The back is scratched up & there is a slight scratch on the face. The phone is functionally 100% perfect, just not aesthetically perfect. Now, it does not look like it was dragged behind a semi on concrete or anything, but it shows signs of wear. Given that the phone is fully functional & only has cosmetic issues, what do you think the going rate would be? Is there a site or somewhere to see values besides looking at eBay ended auctions?