I'm not a big fan of qualifiers, but I don't usually let them bother me too much.
One of my biggest pet peeves when it comes to qualifiers is when people try to sell their PSA 8oc for a PSA 8 price. I know it was said earlier that buyers know how to distinguish the price difference between the two, but that statement is false sometimes (Qualifiers and BccG). Believe it or not, we have many people that are uneducated in the grading scale and the qualifiers make it that much more difficult. That being said, it's common sense for most of us, but many, many people use the qualifiers to their advantage to make more money. If you need a qualifier to tell you why you got the grade you did...I feel sorry for you
it's not that hard to tell why you got the grade you did. At least Beckett tells you why you got the grade you did on modern and some older cards.
So realistically, qualifiers are present to tell us we have an otherwise very nice card other than this one defect...just don't get it...give us the real grade and leave off the bs. So let's say that a card grades a PSA 8mk because of a pen mark on the back. What would that card grade if it didn't have the qualifier? PSA 1.5 or 2??? So how can we assess the qualifier properly on marks? We can't simply knock the grade down two notches like the general rule of thumb for other qualifiers? Probably not. Just something to chew on...