I'm selling my 3GS on E-Bay, and have successfully JB/unlocked it to iOS4 (see my other thread.. was a semi-unconventional JB and lots of fun). Anyhow, I've searched for an easy way to prep my phone for sale without losing the jailbreak/unlock and the solutions I've found seem inefficient. Lots of people suggest creating a fake iTunes account and syncing to it. What happens if you go into Settings > General > Reset > Erase All Content and Settings? I know that in a non-JB situation, when this process is complete the phone is put into restore mode and must then be sync'd. What I don't know is whether my buyer could then sync with his iTunes and be good to go, or whether it spoils the JB/unlock. Thanks!