I have a mid-2012 MacBook Pro that is about 49 months old. The display has been going bad for a while now with several dead pixels, and just last night I got the notification that the battery needs to be serviced. After some research I decided that I have the tools and capacity to replace the display, but would need to take the computer in to Apple for the battery. This means that it would cost me a minimum of $400 to replace both. At this point, I'm considering just selling the computer for parts, and buying a new one. I'm trying to do whatever will be most budget friendly. If anyone has experience with how top-end Apple notebooks age, would it be worthwhile to invest $400+ in a 4 year old notebook? I need a working portable computer, so any decision would happen this week.