In my opinion you do not pay top dollar for a guy that gets it done in the 9th.
If you are playing in a head to head league you are going to be in the running for one category by paying top dollar for top closers. If you wait and draft closers toward the end of the draft you can load up on position players and SPs while your league mates are wasting top picks on the Papelbons and Nathans of the world.
In four years of playing fantasy baseball I have never payed top dollar for closers and I have won 3 of the 4 years running. I would have won the other year if Liriano hadn't got injured that year and pitching hadn't went to shit.
That being said I didn't draft a closer until after the 15th round in my draft this year. I started out with Soria, Lyon, and R. Soriano. After Soriano went down I traded Soria in a deal for E. Volquez (after my Smoltz and Gallardo went down to injury to sure up my SP) and made a deal of Shawn Marcum for Sherrill and Putz. While Putz hasn't lived up to expectation I now have a staff of closers that is made up of Lyon, Sherrill, and J.J. That has put me in the running each week to win saves, if not win the category all together.
Never pay top dollar for a closer, unless you play in a league that dictates you having to do so, those are few and far between.