My dad and I switched over to the iphone 3gs back in late june and the phone in the title has since then been restored. Im the one in charge of selling it. I have a couple of questions to address. 1) Should I jailbreak it/unlock it before I sell it? 2) Can I keep the factory settings but still be able to update it to 3.13?By that I mean will the buyer open the phone and 3.13 will already be on there? Or will it be fully restored to the point where it's no different than buying it back in July 07? 3)What places have you found best to sell your old iphone? Ebay, etc? 4) What would be the average price difference if i were to sell it locked vs unlocked?