If the seller did not mention "copy or fake or counterfeit" you will get a full refund from Ebay.
This is another very helpful place. http://www.coincommunity.com/
I see. They go to the PCGS website. Find a coin and number that they have a copy of and slab it.
I thought all the slabs had a number you could look up.
Well somehow these were found to be fake so they were not that good. Just say'n
Seem's to me a coin shop would spot a fake.
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