I will be buying the new iPhone 4G when it is released in June. I currently have an iPhone 3G 16GB, and am going to sell it jailbroken and unlocked to make money to buy the new one. When is everyone going to sell their old ones? Before WWDC? right after? should I try to sell it early to help retain some of its value? just wanted some input from others who were thinking of selling theirs too. Thanks