There's an amazing difference in the availability of pre-Unity (like Magnus #5, Harbinger #1, Solar #10)
and immediate post-Unity (particularly Harbinger #10, Rai #0, Shadowman #8).
It wasn't overnight... but in a window of maybe six months in 1992, the print runs tripled.
Then the 1993 books like Archer & Armstrong #8 and Bloodshot #6 just about tripled the print runs again.
I might need to make a chart.
Anyone have any data like this with other non keys or semi-keys? I would like to see some books added, like Rai 1-5 and see how these stack up to printing.