Posted By:
CatI believe I have seen pencil marks as 30s, but not higher. If it has legible writing (such as grocery list, player stats, or personal notes), as apposed to a mark, then that seems to limit the card to a 20.
I am sure others may have better information. A grader from SGC was at the Net 54 Dinner, he sat at the table I was at and I talked to him for quiet awhile about SGC guidelines and he commented on how some very nice cards have relatively low grades because of their guidelines ...his point seemed to be "grading has relevance and value but in the end you need to buy the card not the holder."
http://www.audiocomedy.net/soundboards/jacket.shtml