I've never met at the police station before. I usually meet in a public place, when I buy a used iPhone, I usually meet at the Apple store to check if it was originally factory unlocked from Apple. I have bought one used Mac, in fact just this year! A Mid 2012 retina, that had ghosting, I've gone to several Apple Stores and all rejected! After a few months of use I've noticed 7 Dead Pixels and 1 burst, brought it into the Apple Store to check for dead pixels with his magnifying glass, 1 day later I've noticed it had lots of scratches all over the screen, the next day I brought it into the Apple Store, and they replaced the screen free of charge. So now my mac is pretty much okay, On the other hand, I'm not to sure about my gpu, I've had lines going across the screen before, extreme lag in iMovie, with small lines appearing on the screen, but when I bring it into the Apple Store, they say the GPU is perfectly fine, they claim its my beta software, I don't think it was, keep in mind its NOT EL CAPTAIN, I've never experienced anything like this. It all started when I was using my Macbook for a year end school movie project, it ran pretty smooth when photoshopping everything appeared to be working fine for our yearbook! Till I was working on the movie part, the computer always ran hot, fine, but burning hot, like it can burn someone. Sorry if it was to lengthy. Plus my Mac went up in price well maybe. Well plus a new lid is a good selling point!