This is my first iphone Im buying from craigslist. What should I look/ inspect for when buying an iphone from Craigslist? 1. Make sure IMEI is clean. 2. Inspect it visually to make sure its as described on ad. 3. Does ATT check to make iphone works perfectly? 4. Any suggestions? I will be meeting someone at an ATT store tomorrow. Thank you for your suggestions.