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<p>[QUOTE=&quot;physics-fan3.14, post: 7696172, member: 19165&quot;]R-1 is super common, so I&#039;d use the generic date value. </p><p><br /></p><p>R-3 doesn&#039;t usually have much of a premium. </p><p><br /></p><p>What is the rarity of the C-4 and C-5? </p><p><br /></p><p>For the R-5+, your best bet is going to be looking at recent auction sales. Sometimes, R-5s are popular and garner a nice premium, sometimes they fly under the radar.[/QUOTE]</p><p><br /></p>

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