Earle - thanks for sharing that link. This part should really make people think:
"If you take a PCGS graded coin slabbed as MS64, break it out, and resubmit it to PCGS, you are never guaranteed the same grade again. The slabbed coin might come back MS62 (extreme and a bad day for graders), 63, 64, 65, 66 (extreme and a great day for you!). This is b/c the process is all subjective: No scientific/verifiable standards or methods are used."
The advice given to buyers is to buy the coin, not the holder. Why would that advice be given? It's because of what's described above. Yes, there is a perceived value in the services of companies like NGC and PCGS, but it's just not something I would use again
I have used NGC before for a 5-coin submission a little over 10 years ago. I used them mainly to validate a couple of
Peace dollar VAMs that I had cherry picked plus a couple of other coins. I can't recall being unhappy with anything as far as the service or results, I just don't plan to do it again.