Hi! I am thinking of buying a used 17" 2008 MacBook Pro. The seller keeps asking me to give them a price, but I don't know what to tell them because the computer is not in good shape. It has a shattered screen and a massive dent to the right of the keyboard that's about 1.5 inches wide and nearly down to the motherboard. The person selling it bought a new one already and though this broken one does work, it needs some work to be pretty again. What is it worth? Thanks!