Mods .. please dont flip .. ESN changing question

[elesbb]

Alright , im about fed up with Asurion . So i am thinking about dropping them . If i do such a thing and my phone goes poopy .. im screwed .. so i was doing some shopping on ebay and noticed there are quite a few sprint phones on their site .. i found another TP2 that had a bad ESN , would changing that ESN to my current phone make it activatable ?? yes i could just buy one that has a clean ESN but the ones that have bad ESNs are cheap , and i like cheap .

EDIT: just to make things clear , im NOT asking anyone to show/explain/link me to HOW to change the ESN , just wanting to know if what i mentioned above will work ..

Thanks guys