There’s no set rule on grading penalization when it comes to marks. It really depends on the mark itself. I had a 54 Hodges PSA 4 MK. The mark was a pen dot in back and the card sold basically for what a PSA 4 no mark would sell for.
An otherwise mint card with scribbles on the front will grade a 1 as far as I know but more importantly nobody is likely to pay more than “1 money” for it.
I own a PSA 3MK diamond stars Rick Ferrell. Because it has MK the guy sold it to me for the price of a 1.5 or so. The MK is some light staining on back I think. It’s really a nice 3.
|