Knights Side-Quest 07: Grading Video Games

In this special Peter ( Retrogamepapa ) together with Max and Michiel discuss the grading of video games. Why do people do it? Why do these companies exist? Slight spoiler: Max has a different opinion than Michiel and Peter have on grading video games... Next to discussing graded games, they also talk a bit about owning and/or keeping games sealed. This is something which is almost inherently linked to grading video games. Is there actually a difference between the two in regards to why? For which reasons do people keep games sealed? So many questions... It's all talked about in this side-quest!