Most teams would trade a good regular season out of their star players for outstanding work during the postseason. A good example of this would be Milan Lucic of the Boston Bruins, who has been terrific so far in the 2013 NHL playoffs.
He slept through the beginning of the year but has roared to life in the postseason. You won't find a single Bruins fan or executive that would reverse this.
For every example of a player elevating his game at the right time, there is an example of another guy getting paid several million dollars a year only to fall by the wayside and be a non-factor in the playoffs. Not surprisingly, the teams that failed to get production from their top guys have already been eliminated from the postseason (for the most part), while squads getting top-notch production from top-notch guys are still playing right now.