Are people seriously spending $80-150 bucks on cases for phones? What is wrong with you? Apple care costs around that right? And you can just get a new phone right?
Also, a metal case seems stupid as metal doesn't absorb impact, but rather transmits it to the phone's structure and internals. This is where rubber and plastic excel.
Lastly, China sells those metal exoskeletons for like $15-$30 shipped.