Big contracts can weigh down an organization for agonizing periods of time. Just ask the Cubs about Alfonso Soriano, or the Astros about Carlos Lee.
Usually, those teams are stuck with their burdens until the contracts mercifully expire and the player leaves, but occasionally, the team finds a buyer willing to take on the contract and the team can escape ahead of schedule.
Most times, the buyer lives to regret the deal, but for the seller, the sweet smell of relief is all that remains.