Dozen? I don't think you are following me sk. The thing is that find a different great closer who can post 90% SV%+ & 65 IP+ every year isn't as easy as you are presenting. For instance, look at this team. Aside Koji who was a one-hit-wonder in 2013, this team has been a failure in this regard since Pap departed. Pap, Kimbrel, Chapman and few others are way safer bets to accomplish these metrics, reason why they are not cheap, mostly Pap, who at the time proved consistency and durability as a closer in the ALE after 6 Y of service (and still in great shape)
Also, Pap's contract in a Y basis is not that much as you are presenting, mostly in the last couple of years. The debate at the time was the length, since some thought that he was already finished/was going to fail. Guess what, his performance has spoken by itself since he left Boston, and that sk, is out of question.