[swarmee]

Originally Posted by scooter729

The MC is equivalent to a 3 grade downgrade, so an 8 MC weighs the same as a 5, or in this case, a 4 MC would be viewed (in PSA's eyes) the same as a 1.

I would much rather have an Aaron rookie that is a 4 MC than a 1, which is what they would likely give you if you asked for it without qualifiers. Maybe they give you a 1.5, but I'd still rather see the 4 MC.

This is either completely incorrect or just outdated. All qualifiers are a 2-point drop for registry purposes, unless you're at the very low end of the grading scale.

Bonus Points and Deductions
Some sets may have bonus points assigned to certain items within a set.

Additionally, the following point deductions are taken for Qualifiers. For example, if your card or ticket is graded PSA 9Q, the grade calculation in the Registry will be 7.

9Q = -2
8Q = -2
7Q = -2
6Q = -2
5Q = -2
4Q = -2
3Q = -1
2Q = -1
1Q & 1.5Q = no deduction

The calculation for bonuses or deductions is as follows:
(Grade + Bonus) x Weight
(Grade – Deduction) x Weight

Qualifier population statistics listed in the Registry take the deductions into account. So, for example, if your item is graded 4MK, it is calculated with the PSA 2 populations.

https://www.psacard.com/psasetregistry/rules