Aliexpress
Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (779.99 USD): FIN6925
Coupon (800.35 USD): BGCAPITALOS8
(CouponsFromChina.com tip: paste coupon code in your cart and click Apply after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BG589b2e, BGAUGUST8
(these coupons are old, so probably won’t work)
Price history and price alert
Price history (for all/most countries) for Lumintop GT98 8xSBT90.2 43000lm Flashlight is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).