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[The_Cave_Troll]

MIdas, I looked at the Heritage numbers that you posted earlier and did a little statistical analysis.

for the 09 VDB I threw out the MS 64 grades because there was only a handful, obviously there weren't enough to be statistically significant. and I threw out the 67's because those were all graded by PCGS, and that would have been a boring comparison. That brings up an interesting question though, why were there 10 PCGS 67's and NO NGC 67's? Is that a reflection on how often those companies give out 67's or does it mean something else? I don't know.

Anyway, For NGC 65 coins the average price was $78.78 with a standard deviation of $5.08.
For PCGS 65's the avearge was $97.11 with a standard deviation of $6.88.

That means that the PCGS 65 coins sell for an average of 23.28% more, but they have a standard deviation that is 35.5% more!

Nor the NGC 66's the average sale price was $166.75 with a standard deviation of $14.08, while the PCGS 66's sold for an average of $204.70 with a standard deviation of $20.12.

Again PCGS sold for more (on average 22.76% more) but had a standard deviation that was 42.83% higher!

Now for the 81S Morgans.

First I disregarded the ANACS coins because of the small sample size and the fact that no one is disputing the fact that NGC and PCGS are the top 2 companies.

The NGC graded coins sold for an average of $151.24 with a standard deviation of $40.57 and the PCGS 65's sold for an average of $157.15 with a standard deviation of $57.38.

Once again the PCGS coins sold for more (on average 3.91% more) but this time the standard deviation of the PCGS sample was 41.43% greater on average!

What these numbers tell me is what we've been hearing all along, PCGS coins sell for more (sometimes a tiny bit more as in the1881 S dollar), but based on the differences in standard deviations, the PCGS graders aren't as consistant as their NGC counterparts. The prices of NGC coins are just much more stable than the prices of PCGS coins. BOCTAOE


BTW, I disregarded the coins that you listed from Teletrade based on the very small (and statistically insignificant) sample sizes.