Agreeing with Spock, and if I could offer some testimony to the
encapsulation or "slabbing" topic. It's been around in coins and
sports cards for a couple of decades now, and I have no knowledge
of those hobbies, but I can speak on slabbing of high grade, high
end comic books.
1999, CGC
http://www.cgccomics.com/ , began soliciting their grading
and slabbing process. The basic tennant is that a comic book would be
reviewed by 3 graders, notes compared and a final grade assigned to
the condition of the individual comic, then encapsulated. The idea was that the graders were, and are, offering a third party independant opinion on the condition of a comic. It makes negotiation
between a sellar and buyer easier. Both recognize the authentication,
so it comes down to price negotiation. I had account # 10011, that is
the 11th commercial account CGC issued, and while I no longer buy and
sell slabs actively the market being too volitile, I have bought and
sold thousands of slabs in the past 10 years. THAT company has still
not fallen from collectors graces, and are still respected, but some
do view slabbing as a hobby sin, when you are asking $20,000 for a
comic book, certification is the only way to go.