For fun, here is an article on a few of the best compensation picks for lost free agents.
http://espn.go.com/blog/sweetspot/post/_/id/7582/striking-gold-with-compensation-picksInteresting that Brian Roberts was the compensation pick for Raffy, and Raffy originally was the Cubs pick for Tim Stoddard. Johnny Damon was a compensation pick for a FA who then piled up negative WAR for the duration of his contract. Of course, the post 2004 Red Sox moves that yielded 5 picks in the 2005 draft are ranked as one of the all-time best mass cash ins of picks.