Want to buy a MacBook Pro for app development, school use, portability and some coding but I dont want to spend more than $850. My main look is on used MacBooks as they run just as good as new ones and I want to get a 13'' 2015 MacBook Pro but they cost to much so i was thinking about getting a 13'' 2014 MacBook Pro which has an i5 2.6ghz, 8gb of ram, and Intel Iris 1536 MB. Would this be a good computer to handle what i want or is there any cheaper options in terms of macs. Thanks.