Seriously, you guys don't know how to become a card grader? It's quite simple for PSA. You request a job application and submit it in person. If you have a pulse you've passed the first requirement. If you wear glasses then all you need to do is make sure you bring in your latest prescription to show that your glassses are up to date. If you're vision isn't great you can still be hired but don't bring your seeing eye dog with you because that increases the chances of the dog getting hired....
I think that PSA performs an ink blot test on the applicants to see if they are capable of subjectively determining exactly what the blotches are...
Seriously, how much training would it require? PSA obviously doesn't provide their graders with the same criteria that they publish on their website, but then again perhaps it's not a requirement to be able to read if you get hired on as a grader for PSA.
Crap, I almost made it until December 31 without saying something negative about PSA, there goes that New Years resolution... but then agian, I didnt' really impart anything that negative about PSA, in fact, I consider what I wrote a compliment based on how I really feel.... does that mean I didn't screw up my New Years Resolution???