These guys had little to no value when they were traded, and they haven't played a single game since then. I don't see how we'd suddenly be able to flip them for anything useful now.
I'm also going out on a limb and predicting that Humphries will end up having a lot less value than some people are anticipating. Even a contender wanting to pick him up would have to send back an inferior player on a similarly bad or worse contract, but there just aren't that many such players/teams. I think in general teams have gotten much smarter, and there aren't as many bad players on horrible contracts as there used to be. So, the value of expiring deals will naturally fall too.
ddb's idea about acquiring a good player by pairing Hump with other assets makes sense to me, but I don't see us pulling off a deal for anyone in the Love/Gasol/Aldridge tier. Guys like David Lee, Danny Granger, Javale McGee, DeAndre Jordan - maybe.