+1

The problem with your argument is that while the first point is probably a correct observation when you average out all cards over all possible gamestates, it's sort of meaningless to apply it to every individual instance and you certainly shouldn't expect it to always hold.



In the case of Sirt Martin, its price point is only relevant when you hit exactly $4 and you want a Knight that does pretty much nothing for your deck development. The last point is especially poignant, because it means you rarely want to open with Sir Martin (just like you rarely want to open with Josephine, Michael or Molly), while the difference between $4 and $5 actually matters most in the early stages of the game.



As for a stack of Sir Martins, I'd say it would be a middle of the road $4.