A:AnswerThis is a used machine. It was likely returned broken and then repaired by a third party and sold by Best Buy. If it works it will do what it’s supposed to, but if not, you probably only have 15 days to return it to a store and a 90 day warranty window for the repair company to fix it.
A:AnswerThis is a MacBook Pro (13-inch, Late 2011) Also know as MacBook Pro 8,1. All the technical specs are here on Apple's website:
https://support.apple.com/kb/SP645?locale=en_US
A:AnswerA grade B is used or "good" condition. The screen has been replaced. There may be some light cosmetic damage on the case, such as scratches and scuff marks.