This is selective feedback. People notice what they want to notice. Thus, every time we see anything that matches our criteria, it reinforces your perception. That said, Android smartphones are now more common than iOS devices so it would come as no surprise for them to be slightly more represented in the market. Additionally, unlike the yearly upgrades to the iPhone, many new Android devices come out in a given year. This allows power users to upgrade their phones more than once a year, not that all do. Finally, it is possible that these sellers are trying to get rid of their devices before new ones are confirmed at the Mobile World Congress.
So in summary: The premise, here, is severely flawed. In wake of an actual conclusion, you present a sweeping generalization. As such, I must reject the argument presented. So no, I don't find it "funny" nor "ironic", but rather expected. Your Verizon iPhone argument may be valid in some cases, but so too could be the cases listed above. In the end, it is a sum of many factors that go into the large "for sale" market in Android powered devices. If anything, this is indicative of Android devices' development as serious products with resale value.