I'm fairly confident that for the next decade that if you want to launch ~10 tons into orbit, it'll cost you $70M whether you launch on Falcon9 or Starship or Neutron or New Glenn. If you want to launch 100 tons, it'll cost you more even though it's the same Starship, just because nobody else can do that.
If you want to launch 1000 rockets you will be able to call up SpaceX and negotiate a much better price, but only if you have good negotiating power -- if you can convince them you won't launch at all if you don't get a good price.