I agree with Jason, if I owned one you would have to pull it out of my cold dead hands. I do have a question. Who says they can't sell them? Was that part of some kind of contract between CR-48 users and Google?
When you agreed to be part of the program you had a EULA. In there states that you where required to return the Pilot machine back to Google if you no longer needed the machine. Sale was prohibited. This isn't being inforced though...look at Ebay. Google has yet to Pull an auction.