FYI - re coin cert numbers. The "stats" page reports 189K for last 30 days but if I go to the number of coins graded from Oct 1 - Nov 1, I get 168K. I guess the discrepancy is due to coins at different points in the grading process. I tend to think the total number subtraction is more accurate than going by the "30 day rate" as those coins are still in process.
PSA just reports 1 number on the first of the month so there is no discrepancy there as the granularity is lower.