Beckett is better than people here seem to think. His WARs from the last three seasons:6.5, 5.0, 5.3. He's basically expected to match what he did last year this year. So assuming a 0.5 WAR dropoff by year you have 4.5, 4.0, 3.5, and 3.0 for his value starting in 2011. At $4.5m a win that values of 20.25m, 18m, 15.75m and 13.5m for a total of $67.5m. So it looks like the Sox didn't get any great deal but pitching tends to cost more so they could have gotten a bit of one and they value marginal wins higher than most anyone else so its still in their interest to make sure they have decent pitching.