Will iPhone 4/4S go out of fashion?

So since iPhone 4/4S's can be found pretty cheaply now especially on eBay, I was wondering if it was worth getting an iPhone 5.
When will the iPhone 4 go out of style/fashion and be frowned upon like using an iPhone 3G.

IPhone 5 users regard them as out of fashion already.
Users of cheap Android phones regard all iPhones as an overpriced rip-off.

It already is starting to go out of fashion. I expect it will be frowned upon in about 6 months time when peoples' contracts start running out and less and less people have one. It also doesn't help that there're cheaper phones which are much more powerful and have better features than all iPhones (EG: Samsung Galaxy, Xperia Z, HTC One).