As host of this forum, I cannot provide a recommendation for any
particular company. I cannot be seen as playing favorites. Suffice
it to say that some companies are better regarded than others and no
company is perfect. PCGS and NGC seem to currently dominate the
market, with ANACS in third.
Ask yourself what you want to accomplish by sending a coin in. Is it
to get a precise, accurate, and thorough description and diagnosis?
You can find the answer for free here and from experts at CONECA.
Simple, straightforward errors are likely to come back with a
reasonably accurate slab label. Novel, obscure, complex, and
multiple errors often end up with descriptions that are inaccurate,
incomplete, or nonspecific. Part of this is due to space constraints
on the slab label. As far as grading goes, it seems to me that
standards go out the window as soon as a grader sees it's an error.
Grossly undergraded and overgraded coins are par for the course.
That's my experience, anyway.
Is it to preserve the coins? There are air-tight capsules you can
Is it for determining authenticity? Again, knowledgeable people will
provide this information without cost. Only a few types of errors
and varieties are subject to careful and artful fakery.
Is it to get the most money during resale? Only some types of errors
benefit from this. The cost of slabbing often eats up any price
differential between raw and slabbed coins.
As you can see, I'm not a big fan of grading services. I never
submit my coins and I crack out almost every one I buy.
--- In email@example.com
> I would appreciate feedback on who is the best and most cost
effective people to sufficiently grade error coins.
> Thank you.