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<p>[QUOTE=&quot;Market Harmony, post: 830069, member: 20154&quot;]I would like to add that there are a great number of sellers on eBay that sell slabbed coins from grading services whose grading standards do not follow numismatic industry standard guidelines, like ANA grading standards.&nbsp; These companies will often overgrade coins.&nbsp; It is not illegal to do so, as they are grading based on their own standards.&nbsp; However, when the majority of price guides are based on ANA grading standards, it may be difficult to ascertain the real value of one of these coins by only relying on the grade assigned by these companies.&nbsp; Here&#039;s a quick list of some grading companies which, when I see a coin slabbed by them, I don&#039;t even look at the coin.&nbsp; Personally, I tend to avoid these:</p><p><br /></p><p>NPG (Numismatic Professional Grading)</p><p>NGP (Numismatic Grading Pros)</p><p>CSI (Certified Silver Investments)</p><p>NTC (Numistrust Corporation)</p><p>SGS (Star Grading Service)</p><p>ANGS (American Numismatic Grading Services)</p><p><br /></p><p>You can do some quick Google searches for these companies to see some reviews.</p><p><br /></p><p>However, there are some grading services which have earned a much better reputation and you should feel comfortable to trust that their grading is on par with ANA grading standards.&nbsp; Some of these are PCGS, NGC, ANACS, ICG, and oldie but goody, PCI</p><p><br /></p><p>The above is my personal opinion and should not be considered investment guidance or advice.&nbsp; My official advice is that you should buy authentic coins that you like, and to rely on your own research and opinions when it comes to buying any coin.[/QUOTE]</p><p><br /></p>

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