The Sox FO doesn't want to give their opposition a free player who could hurt them down the road. Anyone would take him for free. The Sox are trying to get something, not a lot, in return. That market is still not there. If it were, he'd be gone already.
BTW, I am not "making a fuss" about the logjam. I am just noting that one exists. Lowell has no role. It would be optimal if VMart could catch 4 or 5 times a week and DH or play first the other games. That's not making a fuss. In some ways it can be a positive, because you have some good protection if there is an injury to Youk, Ortiz or Beltre, but it is a challenge to the manager and it makes for some inflexibility in other ways. If Scutaro gets a bump or bruise, I really don't want to see Hall at SS for a week. Do you?