My S6's battery is dying so I'm looking to upgrade. I only want to spend $400 or so on a new phone.

I don't want an iPhone, dual sims, cracked screen, pink lines or burnt-in screen.

I do want Android, the best sunlight-readable screen I can get, wireless charging, 64GB total storage or more, and good battery life.

So... anyone upgrading from their S7 active or edge or ordinary S7 to an S8/S9 and wanting to sell? Or selling something equivalent from some other manufacturer?