I have a friend offering a used macbook (he doesn't know the specs) for $300 , it apparently has a bad battery. He is going to loan it to me tomorrow so I can look at it and see if I want it. What things should I look at to see if this is a good deal? Can I get a 3rd party battery from ebay, or should I avoid them and get a branded one. if it does not have a restore disk, can I get one from apple, or elsewhere? Does this sound like a good deal, or should I avoid it and try and save up for a new one?