I'm about to buy a used black macbook from someone I don't know. I know there is a risk when buying used because the computer could look and function good at first, and then completely fail in like a month and I would be screwed because of no warranty. I'm going to go look at it today. It is 30 months old, 2.0 Ghz, 120 Gig Hard drive, 2 GB RAM, superdrive. What should I look for other than the following: Battery - I told him to download Coconut Battery, and health is 93% and cycles is 115. RAM - how do I check if it is apple ram or some third party? Dead Pixels Optical Drive - How do I check if it can burn a dvd without actually burning one? I know it should be able to, but I just want to know if there is something wrong with it. The reason I want to check everything is because he is selling it for a pretty low price.