[Mountaineer1999]

With my very short T206 history it seems obvious to me that marked cards get the shaft. Cards of much lesser grade are valued over anything with a qualifier even if it's just a hint of a mark or a back stamp.
That said, how does SGC grade a marked card? Would it behoove one to buy the marked PSA card crack it open and then submit it to SGC?
I would personally rather look at a bright clean front that may have a mark on the back than a less attractive creased colorless card, but in many instances the value is about equal due to that stigma of having a qualifier.