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<p>[QUOTE=&quot;USS656, post: 366393, member: 6641&quot;]Because almost no one knows how to remove foreign substances from a coin without doing as much or more damage than has already been done.&nbsp; When most people clean a coin the surface has been altered in a very negative way.&nbsp; It looks to a trained eye like you took a brillo pad to it.&nbsp; My guess is that there are probably as many living astronauts as there are people in the US that can attempt clean a coin without doing more damage to it.&nbsp; From everything I have read and seen you really have to know what you are doing to do it properly.&nbsp; You have to know what the outcome will be before you start.&nbsp; You have to understand what you can make better and what will look worse when you are done even if you know what you are doing.</p><p>&nbsp;</p><p>So to answer your question ~ the value is killed because the person that cleaned it didn&#039;t know what they were doing or were willing to clean it and accept the loss in value for other reasons.</p><p>&nbsp;</p><p>Hope this answers your question.&nbsp; Sorry about the SGS experience, I&#039;d probably break them out and try to apply an accurate grade to them.&nbsp; What would be the purpose of leaving them in the slab when you know the information on the slab is not correct.&nbsp;&nbsp; Hope the lesson was not an expensive one!&nbsp; </p><p>&nbsp;</p><p>Best Regards</p><p>&nbsp;</p><p>Darryl[/QUOTE]</p><p><br /></p>

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