I have to add more details. At CGC booth, the grader was in present. I showed him the NM copy with a light neat fingerprint (no smear mark). He said it is one grade lower. I am not sure if it would drop to 9.0/9.2. Few hours later, I brought one key issue (Brave and the Bold #34 - 1st SA Hawkman) from the dealer (his permission) to CGC booth and showed the moderate smeared fingerprints (about 3 fingerprints overlapped) on the back cover. He said this was the worst one than the first one and this may be two or two and half point drop. The dealer's grade was 7.0 so I assumed it was somewhere 5.0 to 5.5. I brought it back to the dealer and told him about the defect and grade drops. I offered him for $150 off his price but the dealer disagreed and said no flatly.
Back in 2019 and partly 2020, I didn't see any graders were in present anymore. I assumed that they want us to submit the books instead. I missed old days when the graders were around at the shows.