Sorry if the thread seems repetitive. I have to buy iPhone 4S for myself and another iPhone (either 3GS or 4) for my dad (he has never used smartphones or iPhones). I am going to buy these 2 phones after tomorrow's announcement in hope of seeing reduced prices in used market (with craiglist being cheaper i guess). What prices am i expecting to see for.. (used) iPhone 3GS 8GB iPhone 4 (8 or 16GB) iPhone 4S (16GB or 32GB). after tomorrow's new iPhone announcement. I am looking for no-commitment phones so i won't be going to carriers to buy.