I've been considering unlocking my iPhone to sell on Ebay before the new 3G iPhone comes out. I've seen unlocked 8GB phones going for as high as $550-$600! I've no newbie to unlocking as I was unlocked and jailbroken for about 3 weeks after the iPhones release, but I've kind of forgotten some things. Is there any current software unlocking methods out right now (independence, pwnage, iliberty, etc) that could withstand an iTunes restore on the phone? This is for SIM unlocking by the way. I just don't want an angry buyer on ebay if I sell the phone and they later have to do a restore for whatever reason and are no longer unlocked to their respective carrier. Thanks.