I am amazed that the lower grade copy Foo #2 went for that much. I would have guessed it would have fetched about $500, maybe $750.
Again the prices for Hairy Who seem to be out of step with the FUGG. Three lower grade copies bringing in 30% more than the list price of 3 pristine copies. One of the three had a near total spine split. Maybe it was the Sack factor.
Judging by the dust shadow, it looks like that exact copy of Foo #2 was acquired at Heritage for roughly $500 in 2013, which strikes me as a bit low. But, yes, a healthy price this time around at almost five times that.
I guess the rule on books as rare as the Hairy Whos is that, if you want them, buy them when you see them. Still, I think you are right, when it comes to discrepancy with prices in Fogel, the Sack Factor has to be taken into account.