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<p>[QUOTE=&quot;-jeffB, post: 1702344, member: 27832&quot;]I do prefer &quot;problem-free&quot; coins, but I don&#039;t avoid problem coins so assiduously as some posters.</p><p><br /></p><p>As we&#039;ve seen, the definition of &quot;problem coin&quot; has evolved over time. Many decades ago, toning (&quot;tarnish&quot;) on a coin was considered a problem, and cleaning was considered the solution.</p><p><br /></p><p>In fifty years, what &quot;specialized analytical instruments&quot; will be built into everyone&#039;s phones, or glasses, or eyes? What conditions that can barely be detected today will make a coin &quot;ungradeable&quot;? Pre-corrosion? Internal strains indicating some sort of mistreatment post-strike? Undesirable crystalline alignments along flow lines? Too much adsorbed oxygen?</p><p><br /></p><p>To me, &quot;problem coin&quot; is to a large degree a question of fashion. Not that I think abrasive cleaning will ever come back into fashion, but I think certain &quot;problems&quot; (for example, light, non-harsh cleaning) are getting a big over-reaction today. I wish people would relax a little bit, but I don&#039;t see it happening any time soon.[/QUOTE]</p><p><br /></p>

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