Put it on ebay, start it off at $0.01 and let it run for a week. I saw an e6400 at over $37 just now, so you'll get something for it. But the longer you keep it, the more value it loses.
I wonder if that would work in my board ... I have a 775 socket, but it's a pretty old motherboard, I wonder if it will support this newer CPU. If so, I would be very intrested. But I am in the New York, USA.