Does this means that the tripple auto is as rare as we think? If there are only 50 that would mean more than half have been sold.
As a comparison, if we take Crabb - and assume that there are 250 cards world wide that means only about 15% have been sold on ebay. Does this mean people are predominantly collecting this set and holding the cards?
I think most people would rather have the individual autographs of the trio rather than the Triple, and that's why more of the Triples seem to be showing up on ebay. Some collectors aren't collecting the update Watson auto either, because they already have hers from the first set. I'm not sure if we have enough data here to contradict the reported 50 for number of Triples.
As to the lesser characters, maybe they are being traded off ebay and that's why they're not in the price guide. Also many Yak Shakers have a tendency to only watch the top 4 autos. I've noticed that when I enter auctions into the price guide, someone's already entered the auto for Dan, but none of the other autos from the same seller had been entered. Maybe a lot of them just never got recorded.