What I haven't seen addressed in this discussion is just what was the
known market value(s) of an Apple I at the time of the 40K$
transaction? News articles seem to present contradictory info, that
the 40K$ purchase from Hatfield was a few months ago, to it being a
couple of years ago.
While a collaborative approach to the sale - splitting proceeds -
might have been more profitable to him, Hatfield sounds like he has
his wits about him, he could have checked, or known, 'what it was
worth'. Without more info it seems difficult to suggest he was 'taken
advantage of'.