Hi, I really want to start developing simple apps for getting started on iOS/Objective C development. I want to spend as little as possible on the machine, as I plan on getting a more apt and specced machine sometime next year(probably a 15" rMBP, or if ever a 15" rMBA ever comes that would be perfect In any case, I was browsing Craigslist and found a 2012 Entry level Macbook Air: Intel Core i5 1.7GHz 4GB DDR3 RAM 128GB SSD I know its not the best specced machine, but as I mentioned, I am hoping it will serve me well to learn the basics of iOS development and hold me up until I get a higher end machine in next year. Price on that Apple Laptop is 550. So I find it quite attractive. Questions are the following: I looked up the serial in Apple.com's page and AppleSerialNumberInfo.com and everything looked in order. Is there anything else I should check/ask before setting up the buy? First time buyer on Craigslist so want to make sure I don't skip anything important. Thanks for your help.