From http://www.pcgs.com/prices/ - the PCGS Price Guide.
David provides coin collectors with info on recent changes in coin prices and other activities in the rare coin market.
Market Comments is a weekly video featuring David Hall. He talks about activity in the rare coin market and weekly, monthly, and yearly changes in coin values.
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Coin World's investigation of 7 leading grading services was very extensive & contradicts your findings. In not one single case did the "big 3" agree with each other & in many cases, were as much as 7 points off. In most samples, Coin World found ACCGS was more conservative than PCGS & ACCGS correctly noted a few coins had been "cleaned" which were overlooked by PCGS & NGC. Not surprising, since PCGS graded many shipwreck gold coins without noting they had been in acid baths.
Gold777Silver 1 year ago