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<p>[QUOTE=&quot;World Colonial, post: 2445045, member: 78153&quot;]I use three concepts of rarity:</p><p><br /></p><p>Absolute rarity or the number which exist.</p><p><br /></p><p>Condition rarity using the TPG grade.</p><p><br /></p><p>The minimal quality or better which most collectors will generally buy.</p><p><br /></p><p>The third one I have never heard of anyone else using but it&#039;s reflective of how people actually collect.&nbsp; For example, though I would never buy one, Mercury dime collectors obviously have no problem buying AG-3 16-D&#039;s, as there are thousands in the TPG population reports.&nbsp; Any other (or at least most other) Mercury dime in this grade is &quot;circulated dreck&quot; and its existence isn&#039;t really relevant to most collectors of the series..[/QUOTE]</p><p><br /></p>

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