Electronics.Woot has 128GB OnePlus 6T A6013 Unlocked Smartphone (Mirror Black U.S. T-Mobile Variant) on sale for $299.99. Shipping is free for Amazon Prime members. Otherwise shipping is $6 without Prime.
Specs
6.41″ 2340×1080 Optic AMOLED touchscreen display
Qualcomm SDM845 Snapdragon 845 octa-core processor
8GB RAM
128GB internal storage
Cameras: Dual 20MP / 16 MP rear | 16MP front
WiFi 802.11ac | Bluetooth 5.0 | NFC
Fingerprint reader (under display optical)
USB 2.0 Type C port
3700mAh battery
Android 9.0 Pie (upgradable to Android 10)
No 3.5mm headphone jack