813DIABLO

Hi guys, I have a d40 now and I love using it because its pretty compact and I can take it almost anywhere I go but late I've been itching to get a new camera and I need some input from people that know more about this stuff then I do. I want to get a used D80 body only. Its seems to be in great condition. I don't know how many shutter actuations it has or too many details about it. So my question is, how much does a body with minimal wear go for and would it be worth it for me to switch from my d40 to the d80 considering I'm no wear near a pro. Any help would be very much appreciated, thanks.