Hello, I'm looking into a MacBook for school just to do the basics: searching the web, music, Netflix, and things like that. My friend is selling me his MacBook Pro 2012 13in for 450$, it's in okay conditions, it works fine it has some scratches, the battery may need a replacement and the screen wobbles a bit. But overalll it seems to work great. I don't know how much it would cost me for a battery replacement/the fixing of the wobble screen. I was also thinking of getting the MacBook Air 2015 13in for 850$ or so as I saw that it was lighter and had extra battery life. It would be brand new. Would it be worth it to buy the MBA for 900$? Or should I spend the 450 on the MBP I really need help on this. I don't really know about computers. Thanks.