Ok this is what you can do. You can flash the device over to all other carriers other then Sprint. Its on the blacklist and this cant be taken off without the owner unreporting the phone stolen.
You can goto places on the net that will flash the device for you.
You can goto places like
http://cdmaflashingsoftware.fortunecity.com/index.html
i use them before they gave me all i needed to flash my sprint phone. Once the phone is on the blacklist it cant be taken off. The esn of that devices is locked. You can change the esn but it will take much effort to get it in there system