Why would anybody buy a 16gb device, especially now that processors and apps are 64 bit (and much larger file sizes). Right out of the box after iOS 8 takes up its share, you are left with about 10 gb. Barely enough to cover a moderately sized song library, much less any other apps or videos.
32GB is the minimum for me for iPhones, with 64GB for iPads. Anything less is just not worth the price.