Hi, I bought a -"perfect condition"- 13" Late 2013 rMBP on eBay and found this small greyish/white dot made of a group of very bright pixels, right on the left side of the screen. Though it's rather small, it's specially noticeable when scrolling up or down, becoming pretty annoying. Please check it out in the pic (the arrow points at it): Are these dead or stuck pixels? I'm quite disappointed about it. Thanks for your help.