Definitely its an old taste.But sometimes old is gold."Nothing could give that comfort in your handling." So for a low budget seekers iphone 4s gives you the best of best undoubtedly.Even you can buy from top rated sellers of different E-Marketing sites for a cheaper price, whom u can believe definitely or you can buy in second hand from your friends.but for all of this I can give you assurance only when there is IOS 7 or IOS 8.
Since IOS 9 makes the phone slower one and that will give you discomfort definitely.i too using iphone 4s since 2 years and I covered IOS7, 8 and finally worst 9.so kindly requesting for iphone 4s users, never update its OS.