So as the title states I have a 16GB 4S that is worth $200 now with VZ Wireless trade-in. Do I trade-in now and save the $200 gift card for obvious use towards a iPhone 6? Or do i wait until new phone is announced with a risk that trade-in value will decline? I have an old Blackberry that I could use in the interim that can keep me texting and getting email for a few months. What do you think?