Totally agree.
Original supply (the print run) has almost no meaning decades later.
Unless the books are still heavily clustered in one spot (unopened cases, or significant hoards), it doesn't matter how many were originally printed. All that matters is how many are available in the current market and the current demand.
99%+ of all comics ever printed are EITHER sitting somewhere that doesn't make them available for sale or they have been destroyed. Even the CGC census rarely has even 5% of the print run of any comic after 16 years in operation... and most of those CGC graded copies are not for sale.
If 40 people want a comic that only has 20 copies available on the market, it doesn't matter if the original print run was 400, 4,000, 40,000 or 400,000. There are 20 available.
Current supply and current demand matter, not original supply and original demand.
Supply is over-rated except when it's not. If NM 98 had the same print run as Walking Dead 1 we would have a completely different ballgame for Deadpool lovers