OS Joy UI (Android 9.0), Resolution 2340*1080 Pixel, ROM 256GB UFS 2.1, GPU Adreno 640, Battery(Built-in) 4000mAh(typ), Display Size 6.39 Inch AMOLED 19.5: 9, CPU Qualcomm Snapdragon 855 Octa Core, max to 2.84GHz, 3900mAh(min), RAM 8GB LPDDR4x.
Aliexpress
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Here are coupons that you can use.
Updated: 03-09-2025
Banggood
Warehouse in China.
Link: Xiaomi Black Shark 2 8/256GB Black
$602.99 with coupon: BGBFAFF2019
Additional Banggood coupons:
1. First page
2. Second page
Price history and price alert
Price history (for all/most countries) for Xiaomi Black Shark 2 8/256GB Black is here. The lowest price was: $469.99.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).