Ok.. disregarding the hyped up speculative profiteering of vintage LP collecting for investment...

A mint 1st generation pressing of an LP is invaluable for archival and re-release purposes
if the original master tapes are lost, destroyed, or damaged beyond listenable repair.

Also, vintage tapes that have had a fair working life over 30 to 60 years
may well have become dulled in higher frequencies, losing Hi Fi audio detail,
which may still be apparent and salvagable on an unplayed 1st generation LP pressing.

But there are no guarantees that an immaculate mint looking LP is actually a good quality pressing.
It might well be from near the end of a run when the metal stamping plates were getting worn out.
Or pressed in lower grade noisier vinyl....