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<p>[QUOTE=&quot;calcol, post: 7892732, member: 77639&quot;]I’ve noticed that older, high-grade copper coins often sell for a huge premium if the color has been graded red (RD) rather than red-brown (RB).&nbsp;&nbsp; These aren’t on my shopping list by a long stretch <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie47" alt=":greedy:" unselectable="on" unselectable="on" />, but here are a couple of examples:</p><p><br /></p><p>1.&nbsp; 1876 IHC in PCGS MS66 auctions for around $2,000 in RB but zooms to $9,000 in RD.</p><p><br /></p><p>2.&nbsp; 1868 2-cent in PCGS MS66 auctions for around $4,000 in RB but zooms to $20,000 in RD.</p><p><br /></p><p>Eventually both the RBs and RDs will be BN unless stored in a vacuum or inert atmosphere.&nbsp; Might take 2 years or 2+ centuries, but it will happen.&nbsp; Oh, and the grading services don’t guarantee color designations on copper.&nbsp; Reds get regraded at your own risk with regard to color.</p><p><br /></p><p>There is a similar, but less pronounced, effect of the magic RD qualifier on prices of lower grade coins.</p><p><br /></p><p>Seems foolish to me.</p><p><br /></p><p>I’ve seen posts on forums alluding to techniques for upgrading color of copper so that the result is acceptable to grading services.&nbsp; I’d really like to learn one.&nbsp; Then I might buy a $4,000 coin and convert it into a $20,000 coin. <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie2" alt=";)" unselectable="on" unselectable="on" /></p><p><br /></p><p>Cal[/QUOTE]</p><p><br /></p>

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