Do you own a iPhone 3GS?(god please don't still own one lol) iPhone 4/4s well then check this out apparently around sometime later this week(probably Thursday) Apple will be holding a big event/program to allow users with older iPhone models to upgrade to their latest flagships(5s/5c) 

Apple is trying to unload inventory of their iPhone's before they release this years newer model(which will come with a larger screen of course) So hopefully that means u can take your older model iPhone's and depending on the condition get a decent amount of money off to upgrade to a newer model. 

Now not much is known at this point but Apple store employees will be updated about this event on Wednesday so expect more news tomorrow and I will post it on the blog of course. If they do allow users to upgrade expect it to be done only in Apple stores and maybe you can get a iPhone for a steal(you know how Apple is with prices)