I have a 3GS that is jaibroken at 3.1.2 and unlocked as well even though I'm uisng it with AT&T (modem firmware is at 04.26.08). In anticipation of getting the 4, I am planning to sell my 3GS and want to sell it as unlocked. I have SHSHs on file with Cydia for 3.1, 3.1.2 and 3.1.3. I'm assuming that I can restore it to 3.1, re-jb it and unlock it and then sell it like that. Is that correct?