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<p>[QUOTE=&quot;physics-fan3.14, post: 776625, member: 19165&quot;]For modern coins, yes, it is nearly impossible (since there are so many that very few coins can be considered scarce, not to mention rare.) However, for classic coinage, specialist groups track the known examples quite closely. The Bust Half Nut Club keeps detailed records of every appearance of R4 and higher bust halves, and readjust the rarity scales on occasion. Steve Herrman does much of this work, and for the most part it is considered rather accurate (within a reasonable error). I&#039;m quite sure other specialist clubs do the same for their respective series - I believe the JRCS does the same. </p><p><br /></p><p>The thing is, it really doesn&#039;t matter how many 1926S Buff&#039;s are left, because it is common and always will be common. Same with other supposed rarities with thousands extant (such as the 1916D Merc, 1909S-VDB, 1955 DDO, etc). Its when you start talking about coins where there are only about 100 known (which is a high R4) that the numbers become important - or trackable.[/QUOTE]</p><p><br /></p>

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