The real cost will be in draft picks that the Brewers now likely won't see. Unless another team signs Sheets before June -- hard to imagine given his health issues -- the Brewers won't receive any draft-pick compensation.
It's been a bad winter for the Brewers as far as draft picks go. Originally, they figured they had a chance at three first-round picks -- their own, and one each from the teams that signed Sheets and CC Sabathia (both Type A free agents).
But Sabathia went to the Yankees, and so did Mark Teixeira. Teixeira ranked higher, so the Angels get New York's first-round pick (26th overall), and the Brewers are stuck with the second choice (right now 70th overall).
The Brewers will still get a sandwich pick (between the first and second rounds) for losing Sabathia, and another one for losing Brian Shouse (a Type B free agent).
As of now, according to Baseball America, the Brewers will have three of the top 44 picks, and five of the top 72. Not bad, but not nearly the haul they were hoping for -- and expecting.