Exactly what I've been saying.
Prior to the sportscard meltdown and the dealer invasion of comics, Number One Issues were where the speculator money was going (which was why there were so many of them), along with "hot artists".
I can remember buying a ~86-'87 OS Guide and Thor 337 was the most expensive comic in the entire Thor (not JiM) run. And they would break out any Miller, Byrne, Adams, etc. comic, no matter what series it was from. For a long time, #1 issues and Artists ruled the roost, and even important first apps like Silver Surfer, Kingpin, Wolverine, etc., were no more than $20-$30, and anything lower on the scale (like Punisher, Thanos, etc.) were commons, and IM 55 was only broken out due to the Starlin art.
And there is no reason why those trends might not turn around again, especially if the current movie fad peters out (as it must someday) and first appearances take a huge nosedive.