Cracked back cover question 0

[Sword Master]

Hi I'm new here and I don't know if this is the best place to post this, so...

Now I've browsed a few topics on here today before posting and so I've read some of the members responses to certain topics, and so no I'm not asking how much of a downgrade this comic I have is going to get if I have it graded, or if whether I should even have it graded or not (because I've read people say that's subjective, etc). I'm also new to all this (to grading). This will probably be my first graded comic if I do submit it for grading. Now with that out of the way, let's get on with this. 

This is a new comic book so everything is perfect (or near perfect) EXCEPT for this one tiny little crack on the back cover. Around 1cm long or less. I think it's factory. Things to also consider: This comic is very sought after (no way to get a cheap copy now), and this one is also a signed copy.

Is this crack a big deal now? Would this get a line of 7 or 8 (grade) instead of say a 9? Tnx in advance!

Exterior and interior shots of the back cover: