If you are looking for an untouched, "new-in-box" unit for a collection or specific legacy use, your best bet is specialized third-party marketplaces:
: You can often find listings labeled as "New" or "New Other" (open box) from collectors or liquidators. buy new htc one m9
Finding a HTC One M9 today is a bit of a treasure hunt. Since it was originally released in 2015, it has long been discontinued, meaning you won't find it at standard retail stores like Best Buy or carrier shops. Where to Look for New Units If you are looking for an untouched, "new-in-box"
: Even if the phone is "new," the lithium-ion battery has been sitting for years and may have degraded or lost its ability to hold a full charge. Where to Look for New Units : Even
: The M9 launched with Android 5.0 Lollipop. Many modern apps (like banking or high-end games) may no longer support such an old operating system.