Howdy. Am new, but your post caught my eye because what I understand is the grading isn't really worth the bother ... unless you have some "unobtainables" in your mint collection.
I don't know why, but a lot of collectors don't care about grading. All I know is whenever I look at the grading system it makes me laugh. Anyway, for what it is worth. I've been collecting since my Early Bird package arrived in the mail and have never quit!