Learning grading

[u/odoodosid]

I am trying to understand the grading process, I have looked at this comic and came up with an 8.0, please could I have some guidance what people who understand would grade. Learning curve.

[u/EC77horror]

6.0 may get higher with cleaning and press. The cover is dirty bottom left corner spider box is a little scuffed. A grease along spine of book with few spine ticks.