Hi there friends. I need your precious advice. I've been considering buying 2 macbooks. There's 2 different budgets. One is £400 and the other is £500. Obviously they will be second hand and probably bought from ebay. What models would you suggest for these 2 price ranges? The one of £400 will be used for basic things, normal use, nothing crazy. The one of £500 will be used for basic things but also with music programs like Logic, Ableton etc. Thank you.