Note: I am not selling this item on MacRumors Marketplace. I simply am trying to get a feel for how much is a fair asking price for my product to see if I want to sell it. I have a unibody aluminum 13" MacBook with a 2.0 GHz Core 2 Duo processor, 4 GB of RAM, and 250 GB hard drive. It is in decent condition, meaning the top of the MacBook itself looks okay. There is a small (0.5" "deep" gash) to the left of the keyboard. Everything works properly except the battery. The battery does not work. Pricing advice and thoughts please? Thanks!