Anyway, the seller is selling $480. However, upon further check with GSX, it appear the phone is blacklisted by T-Mobile.
Be very careful when purchase used. Never buy a phone that is brand new unopened, you might get Android clone. Always run IMEI or serial number, if you can, pay small fee for GSX check. This will tell you details about the phone and if has been repaired and if it has iCloud lock, carrier lock and if it has been blacklisted.