Unfortunately it's a subjective argument (as are they all) and your view of it is no more valid than mine or Mellor/Ward, whether 20k people are willing to meet the asking price or the stadium is empty. Enjoy the game.
As Collymore said yesterday on Talkshit, Premiership prices should be £25-£30 max and going down on a sliding scale from there. Is it correct that some season ticket holders are forking out £37 for their seats for this game?