Another topic that I have significant experience in. LMK IF ITS A TOPIC OF INTEREST? If so, I can create a lesson for it and help everyone understand how I do this. Rather than targeting a 10, you are targeting whatever lower grade is profitable (sometimes even a 4-6 can profit), and then just confirming that the probability of getting that grade or higher is at least 50% (pop & gem rate data). Most cards I grade with SGC, but some higher end cards can still be a candidate for PSA. There is a skill/art to reviewing vintage cards to verify condition as well. We also like to use our friend and partner FrostyFeetCards to inspect, clean, restore, and prep all of our vintage cards for grading. You can also learn to do this yourself and I believe there are folks in this community already with experience here to share too. This same strategy applies to goats from the 80s, 90s, 00s and higher end insert, numbered, die-cut cards, where you can profit with an 8 or 9. The only issue with those is that they are worth a lot less as SGC equivalent grade and likely still have to submit them via PSA. Whereas margins are much closer for pure vintage cards pre 70s.