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<p>[QUOTE=&quot;calcol, post: 3711467, member: 77639&quot;]For the type of error about which you are concerned, a program could easily be written.&nbsp;&nbsp; Algorithm would be:&nbsp;&nbsp; if price of coin in particular grade is greater than price of grade immediately above, then flag.&nbsp; The program to do and report the flagging would be relatively simple and could go through the whole database quickly.&nbsp; Responding to the flags would be a lot more work.&nbsp; Apparently neither Krause or NGC&nbsp; has considered the problem big enough to invest resources to deal with it.</p><p><br /></p><p>For some US coins, a lower grade coin can be worth more than a higher grade coin because of lowball collectors. A PO1 coin can actually be worth more than a F15.</p><p><br /></p><p>Cal[/QUOTE]</p><p><br /></p>

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