I understand. Mine was new, cost $450. The advantage to me was putting all my apps, data and music onboard painlessly, and at 128 G storage, no worries about space. So ... probably convience more than anything. Well that, and I was grandfathered with unlimited data and was 3G, now LTE, which averages around 25mbps here. It was a good move for me.
My wife doesn’t quite understand yet.